Herman Miller Sayl vs SIHOO M18

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

Herman Miller

Herman Miller Sayl

$935 – $1,580

SIHOO

SIHOO M18

$289.99 – $299.99

9 years

longer warranty on Herman Miller Sayl than SIHOO M18 (official terms)

Differences at a glance

Herman Miller SaylSIHOO M18

Price: $935 – $1,580$289.99 – $299.99
Seat height: 16–20.5 in standard; 15–19 in low; 16.5–22 in extended44–54 cm
Seat depth: 16.5 in fixed; 16–18 in adjustable17.91 in (≈ 45.5 cm)
Load capacity: 350 lb (159 kg)330 lb (≈ 150 kg)
Recline: Harmonic Tilt; Tilt Limiter standard, Tilt Limiter with Seat Angle optionalMaximum 126° recline angle
Arms: Options: No Arms, Fixed Arms, Height Adjustable Arms, Fully Adjustable 4D ArmsAdjustable armrests (Up and down)
Lumbar support: PostureFit Sacral Support Standard; Lumbar Support OptionalLumbar support adjusts vertically and horizontally
Warranty: 12-year, 3-shift3 years

From 23 Herman Miller Sayl and 5 SIHOO M18 user reviews, most mentioned first. Green is liked, orange is a caution.

Which is cheaper, the Herman Miller Sayl or the SIHOO M18?

The SIHOO M18 is cheaper to start: $289.99 versus $935 for the Herman Miller Sayl at the brand stores (Oct 2026).

Which has a higher weight capacity?

The Herman Miller Sayl, rated for 350 lb versus 330 lb for the SIHOO M18.

What do owners mention most?

Comfort for the Herman Miller Sayl, and price and value for the SIHOO M18, based on review summaries.