FlexiSpot OC3 vs SIHOO M57

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

FlexiSpot

FlexiSpot OC3

$269.99

SIHOO

SIHOO M57

$319.99

2 years

longer warranty on FlexiSpot OC3 than SIHOO M57 (official terms)

Differences at a glance

FlexiSpot OC3SIHOO M57

Price: $269.99$319.99
Seat height: 18.5–22.4 in (47-57 cm)46–55 cm (≈ 18.1-21.7 in)
Seat depth: 15.9 in (40 cm)18.11 in (≈ 46 cm)
Load capacity: 300 lb (136 kg)330 lb (≈ 150 kg)
Recline: 90–130°Reclines up to 126°
Arms: 2D; 3.9" height adjustment3D coordinated armrests (up and down, left and right, forward and backward)
Headrest: 2D headrest; 2.1" height and 30° rotationHeadrest adjusts vertically up to 3.9 inches and rotates 45 degrees
Lumbar support: 1.9" Height AdjustableDual-adjustable lumbar support (vertical and horizontal)
Warranty: 5 Years3 years

Which is cheaper, the FlexiSpot OC3 or the SIHOO M57?

The FlexiSpot OC3 is cheaper to start: $269.99 versus $319.99 for the SIHOO M57 at the brand stores (Sep 2026).

Which has a headrest?

Both: the FlexiSpot OC3 as standard and the SIHOO M57 as standard.