Office chairs

What Does an Ergonomic Office Chair Cost, and What Do You Get at Each Price?

Published · By Ergocrew · Specs and guidance as of that date, from the pages under Sources

Summary

The chairs compared here ranged from $159.99 to $609.99 at the makers' US stores, checked 2026-10-13. A larger budget does not automatically buy a better fit: ProtoArc lists 1.6" of seat-depth adjustment on the entry-priced Flexer, while more expensive chairs offer different armrest and lumbar adjustments. Start with the adjustment your present chair cannot provide, then compare the exact color and version. A pull-out leg rest serves a different purpose from an under-desk footrest.

What every chair should adjust, at any price

OSHA's purchasing guide sets a baseline that does not depend on price. It gives a seat height range of 15 to 22 inches and a seat pan length of 15 to 17 inches. It also asks for an adjustable seat depth, lumbar support that matches the curve of the lower back, and a backrest that reclines at least 15 degrees and locks firmly into place.

For armrests, it calls for height adjustment from 7 to 10.5 inches above the seat pan and spacing of at least 16 inches. OSHA's chair guidance adds that "The chair should have a five-leg base with casters that allow easy movement along the floor."

Use those checks to see where a fixed setting would leave you without room to adjust. A feature count cannot tell you whether the seat and backrest fit your body. OSHA's purchasing guide also recommends trying a chair "for comfort and fit over an extended period of time prior to purchase."

The price table

Prices are the selling prices at each maker's US store, checked 2026-10-13. "From" means the lowest of several colors or versions. Chairs are grouped by that price into under $200, $200-$299, $300-$499 and $500 and up. Specs are the makers' claims, checked 2026-10-23 except the S300 and C300 Ultra V2 entries, checked 2026-11-01. A dash means an adjustment remains unconfirmed; ask the maker before relying on it.

Model, under $200Price at the maker's US store, checked 2026-10-13Seat depth adjustmentLumbarArmrests
ProtoArc Flexer$159.99 at ProtoArc's US store1.6"Fixed, built into backrest shapeHeight-adjustable, 3.9" range
Sihoo M18from $169.99 at Sihoo's US store—Vertical and horizontalUp and down
Sihoo M56C$184.99 at Sihoo's US store—Ultra-wide dynamicUp and down
Sihoo B100from $199.99 at Sihoo's US store——2D flip-up
Model, $200-$299Price at the maker's US store, checked 2026-10-13Seat depth adjustmentLumbarArmrests
ProtoArc Flexer Pro$209.99 at ProtoArc's US store1.6" sliding seatTwo-piece, 0-2" height4D
Sihoo M102C$229.99 at Sihoo's US store—Separate, up/down 6 cm3D
Sihoo M57from $239.99 at Sihoo's US store———
Sihoo M59ASfrom $239.99 at Sihoo's US store—Dynamic3D flip-up
ProtoArc EC200 Pro$249.99 at ProtoArc's US store1.97", 5 positions2.36" height, 0.8" depth4D, 30° swivel
Sihoo M56B$259.99 at Sihoo's US store———
Model, $200-$299 continuedPrice at the maker's US store, checked 2026-10-13Seat depth adjustmentLumbarArmrests
Sihoo B100 Profrom $259.99 at Sihoo's US store——4D flip-up
Sihoo B300 Profrom $259.99 at Sihoo's US store—0.8" depth, 2" height6D
Sihoo C300from $279.99 at Sihoo's US store—Self-adaptive4D
Sihoo S100$299.99 at Sihoo's US store15.15"-17.12"Dual dynamic4D
Model, $300-$499Price at the maker's US store, checked 2026-10-13Seat depth adjustmentLumbarArmrests
Sihoo C300 Profrom $359.99 at Sihoo's US store16.81"-17.76"Dynamic, adjusts automatically6D
Sihoo Doro C300 Pro V2from $429.99 at Sihoo's US store16.9"-18.5"Moves up or down, 3 levels8D
Model, $500 and upPrice at the maker's US store, checked 2026-10-13Seat depth adjustmentLumbarArmrests
Sihoo Doro S300from $599.99 at Sihoo's US store17.13"-18.11"Dual dynamic6D
Sihoo Doro C300 Ultra V2from $609.99 at Sihoo's US storeAsk Sihoo for rangeUp/down, 3 levels8D

What the extra money buys

Features do not climb neatly from one price band to the next. Seat-depth adjustment already appears at the bottom: ProtoArc lists it on the Flexer, which was $159.99 at ProtoArc's US store, checked 2026-10-13. The S300 adds dual dynamic lumbar support and 6D armrests, while the C300 Ultra V2 lists 8D armrests. Those differences still need to match the adjustment you want; an unconfirmed table cell is not proof that a chair lacks the feature.

The useful comparisons are the individual adjustments:

OSHA's chair guidance says to use a footrest when the seat cannot be lowered, which means a rest under the desk. The pull-out leg rest on a footrest version is a different item: Sihoo's B100 page describes extending it when reclining. If you want leg support while leaning back, compare the B300 Pro's white versions: the footrest adds $299.99 - $269.99 = $30 at Sihoo's US store, checked 2026-10-13. Confirm the selected version and delivery timing with Sihoo; its black standard version was marked backordered on 2026-11-01.

If you need a sliding seat at a smaller budget, compare the ProtoArc Flexer's 1.6" adjustment with the EC200 Pro's 1.97" range. They were $159.99 and $249.99 respectively at ProtoArc's US store, checked 2026-10-13; confirm the usable seat depth and the selected option's price with ProtoArc before buying.

Listed price and selling price

Many of these listings show a higher crossed-out price beside the selling price. The tables use only the selling price, because that is what the store charged on the checked date. Our guide to office chair sale prices covers how to read those crossed-out figures.

What to check on any listing

Browsing for one? Browse chairs in the feed →

Related guides

Sources

  1. OSHA Computer Workstations eTool, Purchasing Guide
  2. OSHA Computer Workstations eTool, Chairs
  3. ProtoArc, Flexer Office Chair
  4. ProtoArc, Flexer Pro Office Chair
  5. ProtoArc, EC200 Pro Ergonomic Office Chair
  6. Sihoo, M18 Ergonomic Office Chair
  7. Sihoo, M56C Ergonomic Office Chair
  8. Sihoo, B100 Ergonomic Office Chair
  9. Sihoo, M102C Ergonomic Office Chair
  10. Sihoo, M57 Ergonomic Office Chair
  11. Sihoo, M59AS Ergonomic Office Chair
  12. Sihoo, M56B Ergonomic Office Chair
  13. Sihoo, B100 Pro Ergonomic Office Chair
  14. Sihoo, B300 Pro Ergonomic Office Chair
  15. Sihoo, C300 Ergonomic Office Chair
  16. Sihoo, S100 Ergonomic Office Chair
  17. Sihoo, C300 Pro Ergonomic Office Chair
  18. Sihoo, Doro C300 Pro V2 Ergonomic Office Chair
  19. Sihoo, Doro S300 Ergonomic Chair
  20. Sihoo, Doro C300 Ultra V2 Ergonomic Chair

We have not tested these products. Specs and guidance are as published on these pages on the date above and can change; the manufacturer's page for your model has the current details.

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