SIHOO Doro S300 vs FlexiSpot Standard Ergo Office Chair (C4)

Side by side from official specifications, sourced prices and User Insights. No written comparison exists for this pair yet.

SIHOO

SIHOO Doro S300

$999.99

FlexiSpot

FlexiSpot Standard Ergo Office Chair (C4)

$219.99 – $239.99

$780

lower starting price for FlexiSpot Standard Ergo Office Chair (C4) than SIHOO Doro S300 at the brand stores

Differences at a glance

SIHOO Doro S300FlexiSpot Standard Ergo Office Chair (C4)

Price: $999.99$219.99 – $239.99
Seat height: 47 – 55.5 cm (18.50 – 21.85 in)17.91–20.87 in
Seat depth: 40 – 47 cm (15.75 – 18.50 in)19.49 in
Load capacity: 330 lb (≈ 150 kg)300 lb
Recline: Recline Angles: 100°, 110°, 130°90–135°
Arms: 6D coordinated armrests (up and down, left and right, front and back, inward and outward, with tilt-lock of armrests, and synchronized recline)3D
Headrest: Soft, integrated headrest; upper backrest adjusts in 5 levels3D
Lumbar support: Dual dynamic lumbar support; angle 90°-105° fine-tuned with the gas liftfixed
Warranty: 3 years5 years

Which is cheaper, the SIHOO Doro S300 or the FlexiSpot Standard Ergo Office Chair (C4)?

The FlexiSpot Standard Ergo Office Chair (C4) is cheaper to start: $219.99 versus $999.99 for the SIHOO Doro S300 at the brand stores (Oct 2026).

Which has a higher weight capacity?

The SIHOO Doro S300, rated for 330 lb versus 300 lb for the FlexiSpot Standard Ergo Office Chair (C4).

Which has a headrest?

Both: the SIHOO Doro S300 as standard and the FlexiSpot Standard Ergo Office Chair (C4) as standard.