FlexiSpot Premium Ergonomic Office Chair (C7 Max) vs SIHOO M57

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

FlexiSpot

FlexiSpot Premium Ergonomic Office Chair (C7 Max)

$549.99 – $599.99

SIHOO

SIHOO M57

$319.99

7 years

longer warranty on FlexiSpot Premium Ergonomic Office Chair (C7 Max) than SIHOO M57 (official terms)

Differences at a glance

FlexiSpot Premium Ergonomic Office Chair (C7 Max)SIHOO M57

Price: $549.99 – $599.99$319.99
Seat height: 18.5–20.9 in46–55 cm (≈ 18.1-21.7 in)
Seat depth: 15.7–17.3 in18.11 in (≈ 46 cm)
Load capacity: 300 lb; 350 lb330 lb (≈ 150 kg)
Recline: 93–135°Reclines up to 126°
Arms: 5D3D coordinated armrests (up and down, left and right, forward and backward)
Headrest: 3D; 2.36 in, 135°Headrest adjusts vertically up to 3.9 inches and rotates 45 degrees
Lumbar support: adjustable self-adaptive dynamicDual-adjustable lumbar support (vertical and horizontal)
Warranty: 10 years3 years

Which is cheaper, the FlexiSpot Premium Ergonomic Office Chair (C7 Max) or the SIHOO M57?

The SIHOO M57 is cheaper to start: $319.99 versus $549.99 for the FlexiSpot Premium Ergonomic Office Chair (C7 Max) at the brand stores (Oct 2026).

Which has a higher weight capacity?

The SIHOO M57, rated for 330 lb versus 300 lb for the FlexiSpot Premium Ergonomic Office Chair (C7 Max).

Which has a headrest?

Both: the FlexiSpot Premium Ergonomic Office Chair (C7 Max) as standard and the SIHOO M57 as standard.