Office Star ProGrid vs SIHOO Doro S300

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 Doro S300

$999.99

$419.99

lower starting price for Office Star ProGrid than SIHOO Doro S300 at the brand stores

Differences at a glance

Office Star ProGridSIHOO Doro S300

Price: $580 – $650$999.99
Seat height: 19.5–23 in (50–58 cm)47 – 55.5 cm (18.50 – 21.85 in)
Seat depth: 19.5” D; Seat Travel: 3.75”40 – 47 cm (15.75 – 18.50 in)
Recline: 2-to-1 synchro tilt control with adjustable tilt tensionRecline Angles: 100°, 110°, 130°
Arms: Height adjustable arms; Arms Max Inside: 19”; Arms to Floor Min: 25.25”; Arms to Seat Min: 6.5”6D coordinated armrests (up and down, left and right, front and back, inward and outward, with tilt-lock of armrests, and synchronized recline)
Lumbar support: Breathable ProGrid® back with built-in lumbar support; Ratchet back height adjustmentDual dynamic lumbar support; angle 90°-105° fine-tuned with the gas lift

Which is cheaper, the Office Star ProGrid or the SIHOO Doro S300?

The Office Star ProGrid is cheaper to start: $580 versus $999.99 for the SIHOO Doro S300 at the brand stores (Sep 2026).

What do owners mention most?

Adjustability for the Office Star ProGrid, and breathability for the SIHOO Doro S300, based on review summaries.