Autonomous Chair Dimensions, Side by Side

Every Autonomous office chair has a different size envelope, weight capacity, and seat range, and figuring out which one fits your body, your room, or the desk you already own comes down to the dimensions, not the marketing copy. This guide collects every verified spec for the five chairs in the current lineup - ErgoChair Core, Pro, Mesh, Ultra 2, and Ultra 2 Plus - pulled directly from the live product pages and organized so the differences show up in one pass.

Side-by-side dimension table

ErgoChair Core - the most compact

The ErgoChair Core has the smallest seat panel (18.5"L × 20"W) and the highest minimum seat height (20") in the lineup. It's the right chair for compact rooms and users 5'4"–6'2" who don't need the lowest seating position. 130° recline with 40° tilt range - the widest tilt of any chair in the lineup, but with fewer lock positions than the Pro.

The dual backrest panel is 22" tall on its own, extending to 28.7" with the 3D adjustable headrest installed. The chair uses mesh fabric with PU upholstery at high-contact points (headrest, armrests, parts of the seat).

ErgoChair Core

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$299

ErgoChair Pro - the tallest backrest

The ErgoChair Pro has the deepest seat (19"–21.5" depth) and one of the tallest backrest configurations (28"–31"H with headrest) in the lineup. The 9 adjustment points include a 6-inch sliding lumbar range - the most fine-grained lumbar adjustment of any Autonomous chair.

Seat height range is 18.5"–22", which fits users from 5'2" to 6'4" with feet flat on the floor. The Donati Italian synchro-tilt mechanism is rated for 100,000 cycles with 5 lockable recline positions.

ErgoChair Pro

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$499

ErgoChair Mesh - the lowest seat height ceiling

The ErgoChair Mesh has the same 19" × 19" seat as the Pro but a slightly shorter seat depth range (18"–20"). Seat height tops out at 21.5", which fits users up to about 6'2" - half an inch lower than the Pro's 22" ceiling.

The differentiator isn't the dimensions - it's the German Ultra Air Mesh fabric (72% polyester, 28% polyamide) used on both back and headrest. Tighter weave than the Pro's standard mesh. Same 28"–31" total height with the included headrest.

ErgoChair Mesh

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$499

ErgoChair Ultra 2 - the widest seat range, no headrest

The ErgoChair Ultra 2 has the widest seat height range (18"–23") in the lineup - drops the lowest for shorter users at 18" and goes the highest at 23" for taller users. The seat itself is the smallest panel (18" × 18") with depth adjustment 18"–20.5".

The defining structural feature is the lumbarless TPE frame flex - the backrest panel bends with the spine across its full 20"W × 23"H without needing a separate lumbar dial. No headrest on this model. The 25° tilt range exceeds the Pro/Mesh's 22°. Casters step up to 2.56" diameter for the 320 lb load rating.

ErgoChair Ultra 2

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$499

ErgoChair Ultra 2 Plus - Ultra 2 with the headrest

The ErgoChair Ultra 2 Plus uses the same chassis as the Ultra 2 - same 18" × 18" seat, same 18"–23" seat height range, same 320 lb capacity - with a headrest assembly added. Total overall height extends to roughly 31"–35" with the headrest at full extension. Same Donati Italian recline mechanism, same welded ABS frame on a 5-star aluminum base.

ErgoChair Ultra 2 Plus

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$549

Which Autonomous chair fits which body size

Approximate height ranges per chair, based on the seat height adjustment range:

For weight, the simple rule is your weight + 50 lbs of dynamic load shouldn't exceed the chair's rating:

The ErgoChair Core's 242.5 lb capacity makes it the wrong choice for users above 195 lbs (since the chair sees 50+ lbs of dynamic load during normal use).

Frequently asked questions

Which Autonomous chair has the highest weight capacity?

The Autonomous ErgoChair Ultra 2 and Ultra 2 Plus share the highest weight capacity in the lineup at 320 lbs. The ErgoChair Pro and Mesh support 300 lbs. The ErgoChair Core supports 242.5 lbs.

What's the difference between ErgoChair Ultra 2 and Ultra 2 Plus dimensions?

The Ultra 2 and Ultra 2 Plus share identical chassis dimensions - 28" × 28" footprint, 18" × 18" seat, 18"–23" seat height, 20" × 23" back panel. The Ultra 2 Plus adds a headrest assembly that extends total height to roughly 31"–35" depending on seat height adjustment.

Which Autonomous chair has the deepest seat?

The Autonomous ErgoChair Pro has the deepest seat depth adjustment in the lineup at 19"–21.5" - best fit for users with longer femurs. The ErgoChair Mesh runs 18"–20" depth. The Core and Ultra 2 platform sit between at 18.5"–20.5" and 18"–20.5" respectively.

What's the smallest Autonomous chair?

The Autonomous ErgoChair Ultra 2 has the smallest seat dimensions (18"L × 18"W) and smallest overall footprint (28" × 28"). The ErgoChair Mesh and Ultra 2 Plus tie for second smallest with 28.5" × 28.5" and 28" × 28" respectively. The Core and Pro both run 29" overall.

Bottom line

The Autonomous lineup splits cleanly by use case. The ErgoChair Core is the most compact with the lowest weight capacity, fitting smaller rooms and lighter users. The ErgoChair Pro has the deepest seat and the most adjustment range - 9 adjustment points including a 6-inch sliding lumbar. The ErgoChair Mesh shares the Pro's price tier and lifetime warranty but uses German Ultra Air Mesh fabric for tighter weave and better airflow. The ErgoChair Ultra 2 has the widest seat height range and the highest weight capacity in the lineup without a headrest. The ErgoChair Ultra 2 Plus is the Ultra 2 with the headrest added.