Best SIHOO Office Chairs (2026)
Every SIHOO office task chair in our catalog, ranked by the same published score as our other computed lists: spec record, listed features, weight capacity and warranty, taken only from SIHOO's own specifications. Prices are SIHOO's official US list prices.
13 chairs in this list
Prices are the brands' official list prices with the store and date in each product page; they are not live Amazon offers. Confirm the current price, model, condition, delivery and return terms with the seller. List order is not a hands-on test score.
As an Amazon Associate, Chairpedia earns from qualifying purchases.
How we ranked
- Who is included: every SIHOO chair among the published office task chairs in our catalog (gaming, saddle, kneeling and conference chairs are left out). Prices are SIHOO's official US list prices; a chair without one shows "Price not listed" and is still ranked by its score.
- Spec record (up to 20): 20 if the brand publishes the main measurements (spec grade A), 10 if it publishes some (grade B).
- Features (up to 40): 8 points each for headrest, lumbar support, armrests, recline/tilt and adjustable seat depth, when the brand's own specifications list them. A single seat-depth figure counts only if the brand gives a range or says it adjusts.
- Weight capacity (up to 20): 20 for 330 lb or more, 15 for 300 lb or more, 10 for 250 lb or more, 5 for any lower published figure, 0 if not published.
- Warranty (up to 20): 4 points per year, up to 5 years; lifetime counts as 20.
- Ties go to the lower list price, then the name. Affiliate links and commissions play no part in the order, and the score is not a comfort or hands-on test result.
Compare the shortlist
| Chair | Price | Details |
|---|---|---|
| SIHOO Doro S100 | $499.99 – $509.99 | Details |
| SIHOO Doro C300 | $559.99 – $569.99 | Details |
| SIHOO Doro C300 Ultra V2 | $679.99 – $689.99 | Details |
| SIHOO Doro C300 Pro | $789.99 – $839.99 | Details |
| SIHOO Doro S300 | $999.99 | Details |
| SIHOO M57 | $319.99 | Details |
| SIHOO M59AS | $449.99 | Details |
| SIHOO B300 Pro | $329.99 – $379.99 | Details |
| SIHOO Doro C300 Pro V2 | $499.99 – $549.99 | Details |
| SIHOO B100 | $199.99 – $259.99 | Details |
| SIHOO B100 Pro | $259.99 – $299.99 | Details |
| SIHOO M18 | $289.99 – $299.99 | Details |
| SIHOO M56C | $184.99 | Details |
SIHOO Doro S100
Price: $499.99 – $509.99
Score 92/100 — Spec record A: 20 · features (headrest, lumbar support, armrests, recline/tilt, adjustable seat depth): 40 · capacity 330 lb: 20 · warranty 3 yr: 12
The Doro S100 is SIHOO's mesh chair with a split lumbar support: SIHOO calls it dual dynamic lumbar support, two independent pads that follow your posture rather than being set by hand. The upper part of the backrest works as an integrated headrest and adjusts up or down in five levels, the 4D coordinated armrests are linked to the backrest, and the seat depth adjusts. Official figures: the SIHOO US store specification table lists general dimensions of 27" wide, 30" deep and 45"-50" high, a seat depth of 15.15"-17.12", a maximum hip width of 20.07", a maximum load of 330 lbs, a product weight of 49.13 lbs and a 3-year warranty, and the page says the chair suits users from 5 ft (150 cm) to 6 ft 3 in (190 cm). The armrests move up and down 2.76 in, forward and back 1.18 in, side to side, and rotate 72°. SIHOO's UK store comparison table gives a seat height of 46-54 cm (18.11-21.26 in), a seat width of 51 cm (20.08 in) and a recline range of 98°-135°. The UK store lists a lower maximum load (up to 300 lb) and a single seat depth figure (16.53") for its enlarged-seat version; we show the US figures. Price: the SIHOO US store lists a regular price of $499.99 (Black) and $509.99 (White). On 2026-10-08 both colours were shown as sold out on the US store, and the Black version also showed a lower sale price; we only record the regular list price, so check the live page before ordering. Doro S100 against the Doro S300: both have dual lumbar pads and an integrated headrest. The S300 lists at $999.99 and adds 6D arms (the S100 has 4D) and an adjustable lumbar angle; it is heavier (26.2 kg / 57.75 lb on the UK store against the S100's 49.13 lbs) and its UK seat height is 47-55.5 cm against the S100's 46-54 cm. Both list a 330 lb maximum load and a 3-year warranty on the US store. Doro S100 against the Doro C300: the C300 has a single self-adaptive lumbar pad, a separate 3D headrest and 4D arms, and lists at $559.99-$569.99 for the Standard Version. What to check before ordering: availability on the US store, the seat depth range (15.15"-17.12") if you have long thighs, and whether an integrated headrest suits you better than a separate one.
Best for: People who want SIHOO's split dual lumbar pads and an adjustable seat depth at about half the S300's list price
Pros
- Dual dynamic lumbar pads; integrated headrest with 5 backrest levels
- 4D armrests: 2.76 in up/down, 1.18 in fore/aft, 72° rotation
- Adjustable seat depth (15.15"-17.12") and 330 lb US load rating
Good to know
- Has shown as sold out at SIHOO's US store; confirm stock
- No separate headrest; the upper backrest serves as one
- UK store lists a lower 300 lb load and a different seat depth figure
SIHOO Doro C300
Price: $559.99 – $569.99
Score 92/100 — Spec record A: 20 · features (headrest, lumbar support, armrests, recline/tilt, adjustable seat depth): 40 · capacity 330 lb: 20 · warranty 3 yr: 12
A budget-oriented ergonomic chair: an adaptive dynamic lumbar that follows your back, weight-sensing self-adjusting recline, and a breathable full-mesh back.
Best for: Budget home office with a lumbar that follows your back and self-adjusting recline
Pros
- Weight-sensing self-adjusting recline
- Dynamic lumbar that follows your back
- Breathable full-mesh back
SIHOO Doro C300 Ultra V2
Price: $679.99 – $689.99
Score 92/100 — Spec record A: 20 · features (headrest, lumbar support, armrests, recline/tilt, adjustable seat depth): 40 · capacity 330 lb: 20 · warranty 3 yr: 12
The Doro C300 Ultra V2 is the highest model in SIHOO's Doro C300 line. SIHOO builds it on a reclining base it calls the Zero-Gravity Space Chassis (fiberglass plates combined with a four-spring suspension), with a backrest that glides on a dual-track, dual-spring mechanism as you lean back (SyncroFlex), a sacral-lumbar pad that moves up and down and has three support levels (Domino 2.0), 8D armrests, a 3D headrest, an aluminium-alloy backrest frame and a mesh back and seat. The US store sells it only as the Footrest Version, in Black or White. Official figures (SIHOO US store): seat depth 16.9"–18.5" (1.6" of travel), seat width 20.5", backrest height 21.1"–24.2" above the seat (7 settings over 3.2"), maximum load 330 lbs, net weight 57.10 lbs and recline positions at 105°, 120° and 135°. The seat height (47.5–55.5 cm, about 18.7"–21.9") and the overall size (70 cm wide at the base, 74 cm deep, 113–133.5 cm high) come from the dimension drawing in SIHOO's specification panel, not from the written spec list, and that drawing labels the seat depth about 0.5 cm shorter than the written figure. SIHOO does not publish a recommended user height for this model. Warranty: 3 years, covering manufacturing defects (SIHOO US store). Price: the SIHOO US store lists $679.99 (Black) and $689.99 (White). On 2026-10-13 the store showed $609.99 and $619.99; we record the list price only, so check the live page before ordering. What to check before ordering: the seat height is published only in a drawing, so compare 47.5–55.5 cm with your desk height and leg length. There is no version without the footrest on the US store, and the chair weighs 57.10 lbs (SIHOO's UK store says it ships in two packages).
Best for: People who want the recline-focused top model of the Doro C300 line, with a footrest, adjustable seat depth and a height-adjustable backrest
Pros
- Seat depth 16.9–18.5 in, seat width 20.5 in, back height 21.1–24.2 in
- Three recline positions (105°, 120°, 135°) and a built-in footrest
- Sacral-lumbar pad that moves up and down with 3 support levels; 8D armrests
Good to know
- Seat height is shown only in SIHOO's dimension drawing, not the spec list
- Sold only as the Footrest Version on the US store
- Net weight 57.10 lb
SIHOO Doro C300 Pro
Price: $789.99 – $839.99
Score 92/100 — Spec record A: 20 · features (headrest, lumbar support, armrests, recline/tilt, adjustable seat depth): 40 · capacity 330 lb: 20 · warranty 3 yr: 12
The Doro C300 Pro is the step up from SIHOO's Doro C300 in the brand's mesh office chair range, and sits below the Doro S300 in price. It keeps the C300's general shape (a mesh back and mesh seat, a separate adjustable headrest and an automatic lumbar pad) and adds two things SIHOO highlights on the product page: an adjustable seat depth and 6D armrests that move up and down, left and right, front and back, inward and outward, with a tilt-lock and a linked recline. Official figures: SIHOO's US store lists general dimensions of 28" wide x 28" deep x 45"-51" high, a seat depth of 16.81"-17.76", a maximum hip width of 20.28", a 330 lb maximum load, a product weight of 55.34 lbs and a 3-year warranty, and says the chair is designed for users from 5' to 6'3". The EU store gives a seat cushion height range of 46-56.7 cm (18.11-22.32 in). The UK store quotes a maximum recline angle of 135°. Note that the UK and EU stores list the maximum load as 136 kg (300 lb), lower than the US figure; we show the US figure because this page uses the US store. SIHOO also states BIFMA and SGS certification. The lumbar pad is what SIHOO calls the BM (Body Movement) Tracking System: it is not adjusted by hand but follows the backrest as you change posture. The headrest moves up and down, back and forth and rotates. Seat height, seat depth and recline are all set from one handle on the right-hand side. The chair comes in Black or White, each as a Standard Version or a Footrest Version with a pull-out leg rest. Price: the SIHOO US store lists a regular price of $789.99 (Black) or $799.99 (White) for the Standard Version and $829.99-$839.99 for the Footrest Version. The store usually shows a much lower sale price next to the regular price, so check the live price before ordering; we only record the regular list price. C300 Pro against the Doro C300: the base C300's regular price is $559.99-$569.99 (Standard Version). Both chairs carry a 330 lb maximum load on the US store and a 3-year warranty. The C300 Pro is slightly heavier (55.34 lbs against the C300's 51.15 lb UK net weight), has a wider seat height range on SIHOO's EU figures (46-56.7 cm against the C300's 47-55 cm on the UK store), and swaps the C300's 4D coordinated arms for 6D arms. If seat-depth adjustment and arms that also move inward and outward matter to you, the Pro is the one to compare; if not, the C300 covers the same lumbar idea for less. C300 Pro against the newer Doro C300 Pro V2: SIHOO's US store calls the V2 its "Premium Pick" and gives it a lower regular price ($499.99-$549.99), 8D armrests, a manually adjustable sacral-lumbar pad with 3 levels and a backrest that moves up and down. SIHOO does not publish a seat height for the V2, so the C300 Pro is currently the one of the two with a full official seat-height range. What to check before ordering: your height against SIHOO's 5' to 6'3" range, whether you want the footrest (it adds $40 to the regular price), and the 55 lb weight if you will carry the box upstairs.
Best for: Long desk days for people who want seat-depth adjustment and 6D arms on a mesh chair with automatic lumbar
Pros
- Adjustable seat depth (16.81"-17.76") and 6D armrests
- 330 lb maximum load on the US store
- Automatic lumbar pad, no manual adjustment needed
Good to know
- List price is above the newer C300 Pro V2 (SIHOO US store)
- UK/EU stores list a lower 300 lb (136 kg) load
- No official backrest-height figure (the US label matches overall height)
SIHOO Doro S300
Price: $999.99
Score 92/100 — Spec record A: 20 · features (headrest, lumbar support, armrests, recline/tilt, adjustable seat depth): 40 · capacity 330 lb: 20 · warranty 3 yr: 12
SIHOO task chair with a recline mechanism and split lumbar support.
Best for: Home offices wanting soft mesh, split lumbar support and a recline mechanism
Pros
- Dual dynamic lumbar pads with 90°–105° angle adjustment
SIHOO M57
Price: $319.99
Score 84/100 — Spec record A: 20 · features (headrest, lumbar support, armrests, recline/tilt): 32 · capacity 330 lb: 20 · warranty 3 yr: 12
The M57 is SIHOO's all-mesh M-series chair: a mesh seat and a mesh back, a lumbar pad that moves up/down and in/out, a headrest that rises and tilts, and 3D armrests. It is sold in Black, Gray and White. Compared with the M18, which has a foam seat cushion, the M57 uses mesh for the seat as well (SIHOO's own comparison). Official figures: SIHOO's DE store lists a seat height of 46–55 cm, a seat width of 51 cm, a seat depth of 46 cm and a recommended user height up to 185 cm; the US store lists a seat depth of 18.11", overall dimensions of 28" wide x 28" deep x 42"-49" high, a 330 lb maximum load, a chair weight of 44.8 lb and a recline up to 126°. The headrest adjusts up to 3.9 in vertically and rotates 45°; the armrests move up and down, side to side and forward and back. SIHOO does not publish a seat-depth adjustment for the M57. Warranty: 3 years (SIHOO US store). Price: the SIHOO US store lists $319.99 for all three colours. On 2026-10-09 the store showed a sale price of $239.99; we record the list price only, so check the live page before ordering. What to check before ordering: the seat depth is fixed (46 cm), so it suits average thigh lengths best, and the recline stops at 126°.
Best for: People who want a budget all-mesh chair with an adjustable lumbar pad, an adjustable headrest and 3D arms
Pros
- Mesh seat and back
- Seat height 46–55 cm and seat width 51 cm published by SIHOO (DE store)
- Lumbar adjusts vertically and horizontally; headrest rises 3.9 in, rotates 45°
Good to know
- Shorter owners say the seat can run long
- Recline stops at 126°
- US and DE stores list seat width differently (20.08 in hip width vs 51 cm)
SIHOO M59AS
Price: $449.99
Score 84/100 — Spec record A: 20 · features (headrest, lumbar support, armrests, recline/tilt): 32 · capacity 330 lb: 20 · warranty 3 yr: 12
The M59AS is a SIHOO mesh chair with a two-part backrest: an upper back section and a separate lower section that SIHOO describes as dynamic lumbar support, moving with the lower back. It has 3D armrests that also flip up so the chair can slide under a desk, a double-jointed headrest, a mesh seat and an integrated coat hanger. It is sold in Black and in a White-frame version. Official figures: SIHOO's UK store lists a seat height of 46.5–56.5 cm (18.31–22.24 in), a seat depth of 43.5 cm (17.13 in) and a maximum seat width of 50.5 cm (19.88 in); the DE store gives the same seat height. The US store lists overall dimensions of 28" wide x 28" deep x 45"-53" high, a 330 lb maximum load, a chair weight of 36.7 lb and a recline up to 126°. SIHOO's UK store lists a lower maximum load (136 kg / 300 lb); we show the US figure. Warranty: 3 years (SIHOO US store). Price: the SIHOO US store lists $449.99 for both colours. On 2026-10-09 the store showed a sale price of $239.99; we record the list price only, so check the live page before ordering. What to check before ordering: the seat depth is fixed (43.5 cm), SIHOO describes no manual lumbar adjustment, and the recline stops at 126°.
Best for: People with small desks who want flip-up arms, a 46.5–56.5 cm seat-height range and a two-part mesh back
Pros
- Flip-up 3D armrests
- Seat height 46.5–56.5 cm, seat depth 17.13 in, seat width 50.5 cm (SIHOO)
- Two-part backrest with a lower section that moves with the back; double-jointed headrest
Good to know
- Owners say the spring lumbar is fixed and can sit low or press hard
- SIHOO's UK store lists a lower load rating (136 kg / 300 lb) than the US store
SIHOO B300 Pro
Price: $329.99 – $379.99
Score 82/100 — Spec record B: 10 · features (headrest, lumbar support, armrests, recline/tilt, adjustable seat depth): 40 · capacity 330 lb: 20 · warranty 3 yr: 12
The B300 Pro is the top model of SIHOO's B series. It adds to the B100 line a lumbar pad that adjusts in height and depth (SIHOO calls it 4D MicroFit lumbar), a backrest that moves up and down, 6D armrests that rotate and flip up, a wide 3D headrest, an adjustable seat depth and a recline whose tension adjusts to the sitter's weight automatically. It comes in Black or White, each as a Standard or Footrest Version. Official figures (SIHOO US store): seat depth 16.5"–18.5" (about 2 in of travel), seat width 19.1", maximum load 330 lbs, net weight 43.7 lb, three lockable recline angles at 105°, 120° and 135°, lumbar travel 0.8" in depth and 2" in height, and backrest height travel 2.2". SIHOO's UK and EU stores give the seat depth as 42–47 cm, the seat width as 48.5 cm and a lower maximum load of 120 kg; we show the US load figure. SIHOO does not publish a seat height for the B300 Pro. Warranty: 3 years (SIHOO US store). Price: the SIHOO US store lists $329.99 (Black) and $339.99 (White) for the Standard Version and $369.99 / $379.99 for the Footrest Version. On 2026-10-09 the store showed sale prices of $259.99–$299.99; we record the list price only, so check the live page before ordering. What to check before ordering: SIHOO does not publish the seat height range, and the UK/EU stores state a lower load rating than the US store.
Best for: People who want an adjustable lumbar pad, a height-adjustable backrest and an adjustable seat depth at a mid-range SIHOO list price
Pros
- Lumbar pad adjusts 0.8 in in depth and 2 in in height
- Adjustable seat depth (16.5"–18.5") and backrest height (2.2")
- 6D armrests that also flip up; three recline locks to 135°
Good to know
- SIHOO does not publish the seat height
- SIHOO's UK and EU stores list a much lower load rating (120 kg)
- Seat width 19.1" is narrower than the M57 (51 cm) and M59AS (50.5 cm)
SIHOO Doro C300 Pro V2
Price: $499.99 – $549.99
Score 82/100 — Spec record B: 10 · features (headrest, lumbar support, armrests, recline/tilt, adjustable seat depth): 40 · capacity 330 lb: 20 · warranty 3 yr: 12
The Doro C300 Pro V2 is SIHOO's redesign of the Doro C300 Pro, which the US store currently labels its "Premium Pick". SIHOO calls it a full-body adaptive chair: the headrest, backrest, lumbar pad and armrests are linked by what the brand names the DynaCore synchronized support system, so they move together as you sit upright, lean back or shift position. The backrest glides as you recline (SyncroFlex Back-Glide), and the recline resistance adjusts to the sitter's weight. Official figures: SIHOO's US store specification table lists a seat depth of 16.9"-18.5" (a 1.6" slide), a seat width of 20.5", a backrest height of 20.5"-23.6" above the seat (7 height settings over a 3.2" range), recline angles of 105°, 120° and 135°, a maximum load of up to 330 lbs, a net weight of 59.64 lbs and a 3-year warranty covering manufacturing defects. The store's FAQ says the chair is designed for users from 4'11" to 6'3" (150-190 cm). The UK store gives the same table in metric (seat depth 43-47 cm, seat width 52 cm, backrest height 52-60 cm, up to 150 kg, 27.37 kg). SIHOO does not publish a seat height range for the V2 on its US, UK or EU stores, so we leave that field empty rather than estimate it. Adjustments: the Domino Sacral-Lumbar Support 2.0 pad moves up or down and has 3 support levels, which is a change from the self-adjusting lumbar on the original C300 Pro. The 8D armrests move up, down, forward and back, rotate and tilt; SIHOO shows the rear of the armrest tilting up for handheld gaming and the arms swinging aside to pull closer to the desk. The 3D headrest is described as 28% wider than before and adjusts in three directions. Seat depth and recline are set from a handle on the right-hand side. It comes in Black or White, each as a Standard Version or a Footrest Version. Price: the SIHOO US store lists a regular price of $499.99 (Black) or $509.99 (White) for the Standard Version and $539.99-$549.99 for the Footrest Version. The store also shows a lower sale price; we only record the regular list price, so check the live price before ordering. C300 Pro V2 against the C300 Pro: on regular price the V2 costs less ($499.99-$549.99 against $789.99-$839.99), has 8D rather than 6D armrests, a manually set lumbar pad with 3 levels rather than an automatic one, a height-adjustable backrest, and a slightly longer seat-depth range (16.9"-18.5" against 16.81"-17.76"). The C300 Pro is lighter (55.34 lbs against 59.64 lbs) and is the one with an official seat-height range. Both list a 330 lb maximum load and a 3-year warranty on the US store. C300 Pro V2 against the Doro C300: SIHOO's own comparison table on the V2 page lists the C300 with 4D armrests and a dynamic lumbar support, against the V2's 8D armrests and Domino 2.0 sacral-lumbar pad. The C300's regular price is $559.99-$569.99 (Standard Version). What to check before ordering: your height against SIHOO's 4'11" to 6'3" range, the 59.64 lb weight (the UK store says it ships in two packages), and whether you prefer a lumbar pad you set yourself or one that adjusts on its own.
Best for: People who want a mesh chair with a lumbar pad they can set (3 levels), 8D arms and a height-adjustable backrest at a lower list price than the C300 Pro
Pros
- 8D armrests and 3-level adjustable sacral-lumbar pad
- Backrest height 20.5–23.6 in and seat depth 16.9–18.5 in
- 330 lb maximum load; 105°/120°/135° recline
Good to know
- SIHOO publishes no seat height range
- Net weight 59.64 lb
SIHOO B100
Price: $199.99 – $259.99
Score 74/100 — Spec record B: 10 · features (headrest, lumbar support, armrests, recline/tilt): 32 · capacity 330 lb: 20 · warranty 3 yr: 12
The B100 is one of SIHOO's lower-priced mesh chairs, built around flip-up arms. On its US store SIHOO describes a floating sacral cushion (a support pad placed lower than a usual lumbar pad, at the base of the spine), a wide 2D adjustable headrest, flip-up 2D armrests so the chair can slide under a desk, and a backrest that locks in three recline positions up to 135°. It is sold with a mesh seat or a cushioned foam seat, and the mesh-seat version also comes as a Footrest Version with a pull-out leg rest. Official figures: the SIHOO US store lists general dimensions of 27.6" wide, 28.3" deep and 44.1"-51.6" high, a product weight of 36.4 lbs, a maximum load of 330 lbs and a 3-year warranty. SIHOO's EU store gives a seat height range of 18.3" to 21.9" in its product description and names the three recline angles as 110°, 125° and 135°. SIHOO does not publish a seat depth or seat width for the B100 on its US, UK or EU stores, so we leave those fields empty rather than estimate them. Price: the SIHOO US store lists $199.99 for the Cushioned Seat Standard Version, $219.99 for the Mesh Seat Standard Version and $259.99 for the Mesh Seat Footrest Version, in Black or White. SIHOO also sells a B100 Pro; that is a separate model and is not covered on this page. B100 against the M18: on regular price the B100 ($199.99-$259.99) lists below the M18 ($289.99-$299.99). Both list a 330 lb maximum load and a 3-year warranty and weigh about the same (36.4 lbs against 37.1 lbs). The M18 has a lumbar pad you move up/down and in/out and a headrest that travels 3.9" and pivots 45°; the B100 has flip-up arms, a sacral cushion instead of an adjustable lumbar pad, and a 135° maximum recline against the M18's 126°. What to check before ordering: SIHOO gives no seat depth figure, and the US store offers 30-day returns if the seat does not suit your thigh length; the arms are described as 2D, fewer adjustments than the 4D or 6D arms on SIHOO's Doro models; and choose between the mesh seat and the cushioned seat, which also changes the price.
Best for: Small rooms and shared desks where flip-up arms let the chair slide under the desk, at a list price below the M18
Pros
- Lowest SIHOO list price on Chairpedia (SIHOO US store)
- Flip-up 2D armrests to tuck the chair under a desk
- 330 lb maximum load and 3-year warranty (US store)
Good to know
- SIHOO publishes no seat depth or seat width
- 2D armrests: fewer adjustments than SIHOO's Doro models
- No adjustable lumbar pad; a fixed sacral cushion instead
SIHOO B100 Pro
Price: $259.99 – $299.99
Score 74/100 — Spec record B: 10 · features (headrest, lumbar support, armrests, recline/tilt): 32 · capacity 330 lb: 20 · warranty 3 yr: 12
The B100 Pro is an upgraded B100 from SIHOO: the same listed overall size, a mesh back and seat with a waterfall front edge, larger 4D armrests that flip up so the chair can slide under a desk, a wide 3D headrest and a responsive lower-back support. It comes in Black or White, as a Standard Version or a Footrest Version. Official figures (SIHOO US store): overall dimensions 27.6" wide x 28.3" deep x 44.1"-51.6" high, maximum load 330 lbs, product weight 36.4 lb and a three-position recline up to 135°. SIHOO does not publish a seat depth or seat width for the B100 Pro. Its UK and EU B100 Pro pages contain a seat-height sentence (18.3" to 21.9") that names the B100, so we do not show it as a B100 Pro figure. Warranty: 3 years (SIHOO US store). Price: the SIHOO US store lists $259.99 for the Standard Version and $299.99 for the Footrest Version (Black or White), with no separate sale price; on 2026-10-09 the Standard Version was shown as sold out. Check the live page before ordering. What to check before ordering: SIHOO publishes no seat size for this model, and the lumbar support has no manual height or depth adjustment described by SIHOO; if you want those, the B300 Pro adds them.
Best for: People who want flip-up 4D arms, a wide headrest and an optional footrest in a low-priced SIHOO mesh chair
Pros
- Larger 4D armrests that flip up
- Wide 3D adjustable headrest
- Three recline positions up to 135°; Footrest Version available
Good to know
- SIHOO does not publish the seat height, seat depth or seat width
- No manual lumbar adjustment described by SIHOO
SIHOO M18
Price: $289.99 – $299.99
Score 74/100 — Spec record B: 10 · features (headrest, lumbar support, armrests, recline/tilt): 32 · capacity 330 lb: 20 · warranty 3 yr: 12
Budget-oriented mesh office chair with an adjustable headrest and lumbar support; verify capacity and adjustment details on the exact listing.
Best for: Budget home office with an adjustable headrest and lumbar support
Pros
- Adjustable headrest
- Lumbar support
- 330 lb capacity
Good to know
- Armrests adjust up and down only
SIHOO M56C
Price: $184.99
Score 69/100 — Spec record B: 10 · features (headrest, lumbar support, armrests, recline/tilt): 32 · capacity 300 lb: 15 · warranty 3 yr: 12
The M56C is the lower-priced chair in SIHOO's M56 line. It has a dual-section mesh backrest 20.3" (51.5 cm) wide with a flexible lumbar panel that moves with the backrest (SIHOO calls it ultra-wide dynamic lumbar support; no manual adjustment is listed), a W-shaped foam seat cushion, a headrest that moves up and down and tilts, and armrests that adjust up and down only. It comes in Black. Official figures (SIHOO US store): overall size 28" wide x 27" deep x 44"–52" high, seat depth 17.1", recline up to 125° with one locking position, and a product weight of 37.15 lb. SIHOO's UK dimension drawing gives a seat width of 51 cm and a backrest height of 56.5 cm. The US page states the load rating two ways: 330 lbs in the spec list and 300 lbs in the feature list and FAQ; we show 300 lbs. SIHOO does not publish a seat height range or a recommended user height for the M56C. Warranty: 3 years (SIHOO US store). Price: the SIHOO US store lists $184.99 and shows no separate sale price. On 2026-10-13 the page showed a Pre-order button, so check availability before ordering. What to check before ordering: the armrests move only up and down, the recline has one lock position, and SIHOO publishes no seat height range, so compare the overall height range with your desk.
Best for: People who want a low-priced SIHOO mesh-back chair with a headrest and a cushioned seat, and who do not need adjustable-depth armrests
Pros
- Seat depth 17.1" and overall size 28" x 27" x 44"–52" published by SIHOO
- Headrest that moves up and down and tilts
- 3-year warranty
Good to know
- SIHOO does not publish a seat height range
- Armrests adjust up and down only
- The US page lists both 300 lbs and 330 lbs as the load rating
Chairpedia may earn a commission when you purchase through links on this page, at no extra cost to you.