X-Chair X4 vs Herman Miller Sayl

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

X-Chair

X-Chair X4

$1,199 – $1,249

Herman Miller

Herman Miller Sayl

$935 – $1,580

$264

lower starting price for Herman Miller Sayl than X-Chair X4 at the brand stores

Differences at a glance

X-Chair X4Herman Miller Sayl

Price: $1,199 – $1,249$935 – $1,580
Seat height: 17.5–20.88 in16–20.5 in standard; 15–19 in low; 16.5–22 in extended
Seat depth: 17.75–19.75 in16.5 in fixed; 16–18 in adjustable
Load capacity: 275 lb (125 kg)350 lb (159 kg)
Recline: SciFloat Infinite Recline + Tilt Lock and Tension allows you to recline and lock into position or increase tension in your recline motion for more fluid movement.Harmonic Tilt; Tilt Limiter standard, Tilt Limiter with Seat Angle optional
Arms: 4-Dimensional armrests come standard (up, down, side-to-side, front-to-back); option to upgrade to FS 360 rotational armrests; Armrest Height 5.875in - 8.875inOptions: No Arms, Fixed Arms, Height Adjustable Arms, Fully Adjustable 4D Arms
Lumbar support: Dynamic Variable Lumbar (DVL)® Support; height adjustable backrest raises the DVL®PostureFit Sacral Support Standard; Lumbar Support Optional
Warranty: 5 years (all parts and materials); 15 years (non-moving metal components, chair frame)12-year, 3-shift

Which is cheaper, the X-Chair X4 or the Herman Miller Sayl?

The Herman Miller Sayl is cheaper to start: $935 versus $1,199 for the X-Chair X4 at the brand stores (Sep 2026).

Which has a higher weight capacity?

The Herman Miller Sayl, rated for 350 lb versus 275 lb for the X-Chair X4.

What do owners mention most?

Back support for the X-Chair X4, and comfort for the Herman Miller Sayl, based on review summaries.