SIHOO M18 vs Herman Miller Cosm High Back
Side by side from official specifications, sourced prices and User Insights. No written comparison exists for this pair yet.
$1,635.01
lower starting price for SIHOO M18 than Herman Miller Cosm High Back at the brand stores
Differences at a glance
Sources
- M18 Classic Ergonomischer Bürostuhl – SIHOO DE official store ↗Checked Oct 16, 2026
- Cosm Specs - Herman Miller ↗Checked Sep 29, 2026
- Sihoo M18 Ergonomic Office Chair – Official US Sihoo Store ↗Checked Sep 29, 2026
- High-Back Cosm Chair - Herman Miller Store ↗Checked Sep 29, 2026
- US Herman Miller Store (price) ↗Checked Oct 11, 2026
SIHOO M18Herman Miller Cosm High Back
- Price
- $289.99 – $299.99$1,925 – $2,400
- Seat height
- 44–54 cm14.8–21.4 in (37.6–54.4 cm)
- Seat depth
- 17.91 in (≈ 45.5 cm)15.9 in (40.4 cm)
- Load capacity
- 330 lb (≈ 150 kg)350 lb (158.8 kg)
- Arms
- Adjustable armrests (Up and down)Leaf Arms; Height-Adjustable Arms; Fixed Arms; No Arms; Arm Height: 7.3–11.7"
- Warranty
- 3 years12-year, 3-shift warranty, with limited exceptions
What users mention
From 5 SIHOO M18 and 33 Herman Miller Cosm High Back user reviews, most mentioned first. Green is liked, orange is a caution.
Adjustability
SIHOO M1810 mentionsHerman Miller Cosm High Back31 mentionsComfort
SIHOO M187 mentionsHerman Miller Cosm High Back31 mentionsDesign
SIHOO M185 mentionsHerman Miller Cosm High Back23 mentionsPrice and value
SIHOO M1813 mentionsHerman Miller Cosm High Back11 mentionsRecline and tilt
SIHOO M183 mentionsHerman Miller Cosm High Back19 mentionsBuild quality
SIHOO M187 mentionsHerman Miller Cosm High Back12 mentions
Questions
Which is cheaper, the SIHOO M18 or the Herman Miller Cosm High Back?
The SIHOO M18 is cheaper to start: $289.99 versus $1,925 for the Herman Miller Cosm High Back at the brand stores (Oct 2026).
Which has a higher weight capacity?
The Herman Miller Cosm High Back, rated for 350 lb versus 330 lb for the SIHOO M18.
What do owners mention most?
Price and value for the SIHOO M18, and comfort for the Herman Miller Cosm High Back, based on review summaries.
SIHOO M18: specs, reviews, where to buy →Herman Miller Cosm High Back: specs, reviews, where to buy →
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