Office Star ProGrid vs SIHOO M18

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

Office Star

Office Star ProGrid

$580 – $650

SIHOO

SIHOO M18

$289.99 – $299.99

$290.01

lower starting price for SIHOO M18 than Office Star ProGrid at the brand stores

Differences at a glance

Office Star ProGridSIHOO M18

Price: $580 – $650$289.99 – $299.99
Seat height: 19.5–23 in (50–58 cm)44–54 cm
Seat depth: 19.5” D; Seat Travel: 3.75”17.91 in (≈ 45.5 cm)
Recline: 2-to-1 synchro tilt control with adjustable tilt tensionMaximum 126° recline angle
Arms: Height adjustable arms; Arms Max Inside: 19”; Arms to Floor Min: 25.25”; Arms to Seat Min: 6.5”Adjustable armrests (Up and down)
Lumbar support: Breathable ProGrid® back with built-in lumbar support; Ratchet back height adjustmentLumbar support adjusts vertically and horizontally

Which is cheaper, the Office Star ProGrid or the SIHOO M18?

The SIHOO M18 is cheaper to start: $289.99 versus $580 for the Office Star ProGrid at the brand stores (Sep 2026).

What do owners mention most?

Adjustability for the Office Star ProGrid, and price and value for the SIHOO M18, based on review summaries.