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Sihoo B300 Pro

Ranked #20 of 24 in Best Ergonomic Office Chairs: Herman Miller, Steelcase, Haworth & More (2026). Here is every spec we scored, where it came from, and how it compares.

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S

#20

Sihoo B300 Pro

Best for: 4D lumbar and 6D arms

4.5/10

What we like

Top armrest adjustments in this comparison (6D)

Watch out for

Seat depth adjustment not published by Sihoo
Maximum seat height not published by Sihoo
Minimum seat height not published by Sihoo

Score breakdown

Weight capacity 25%

Warranty length 20%

Seat depth adjustment * 15%

Maximum seat height * 10%

Minimum seat height * 10%

Armrest adjustments 10%

Adjustable lumbar 5%

Forward tilt * 5%

* Not published by the manufacturer; scored at the lowest published value in this category, so an unpublished figure never outranks a published one.

* Other unpublished figures are scored at the category median so missing data neither helps nor hurts.

Weight capacity	330 lb
Warranty length	3 yr
Seat depth adjustment	Not listed
Maximum seat height	Not listed
Minimum seat height	Not listed
Armrest adjustments	6 D
Adjustable lumbar	Yes
Forward tilt	Not listed
Lumbar	4D MicroFit
Seat height	Not published by the maker
Seat depth range	Not published by the maker
Price	Check price

Check price at Amazon

Specs source:

Sihoo: B300 Pro

Sihoo B300 Pro head-to-head

Head-to-headHbada E3 Ultra vs Sihoo B300 Pro

How it compares

Open the full comparison table

Steelcase Leap

#1 · 4D arms, height-adjustable lumbar, 400 lb

Humanscale Freedom Task Chair

#2 · Self-adjusting recline, 400 lb, 15-year warranty

Haworth Soji XL

#3 · 24.5" wide seat warrantied to 600 lb

Steelcase Series 1

#4 · Steelcase's value chair with 4D arms and 400 lb

Steelcase Gesture

#5 · 360° arms built for devices, 400 lb

Haworth Fern

#6 · Frameless back, optional 4D arms and forward tilt

Haworth Zody

#7 · 4D arms, forward tilt, 16–21" seat

Haworth Soji

#8 · Optional 4D arms, lumbar and forward tilt

Herman Miller Embody

#9 · 3" of seat depth travel and fully adjustable arms

Steelcase Karman

#10 · Light suspension chair with 4D arms

Herman Miller Aeron (Size B)

#11 · The mesh benchmark, sized A/B/C

Herman Miller Sayl

#12 · 350 lb rating with optional height-adjustable lumbar

Herman Miller Cosm (Mid Back)

#13 · Auto-Harmonic tilt, no tension knob

Herman Miller Lino

#14 · Optional seat depth and fully adjustable arms

Branch Ergonomic Chair

#15 · 4" of seat depth travel for 5'2"–6'2"

Branch Verve Chair

#16 · Knit chair with height-adjustable lumbar

Sihoo Doro C300 Pro

#17 · Adds seat depth and 6D arms to the C300

Hbada E3 Ultra

#18 · 2.76" of seat depth travel

Hbada E3 Air

#19 · 330 lb mesh chair with 1.97" seat depth travel

Sihoo Doro S300

#21 · 6D arms with independent dynamic lumbar

Sihoo Doro C300

#22 · Budget 4D arms, self-adaptive lumbar

Branch Ergonomic Chair Pro

#23 · 5D arms, forward tilt and two-way lumbar

#24 · Low-cost mesh chair with dual-adjustable lumbar