Fit Grades · named product · configuration-specific fit
Herman Miller Aeron
Compare Herman Miller Aeron Sizes A, B, and C using configuration-specific published seat geometry.
This is a provisional measured-fit grade based only on the published dimensions listed here—not a review, comfort score, or buying verdict. A retired listing stays on record and is no longer scored. Published user-weight capacity, when the manufacturer states one, is an eligibility warning and not part of the geometry grade.
Every size, graded separately
Size A
Size A · current U.S. consumer build · low cylinder
- Lowest seat height (hard) 14.8 in (375 mm)
- Highest seat height (soft) 19 in (483 mm)
- Fixed seat depth (soft) 16 in (406 mm)
What this size’s grade covers
- Published 14.75–19 in seat-height range
- Minimum knee-clearance check using the published 16 in fixed retail seat depth
Size B
Size B · current U.S. consumer build · standard-height cylinder
- Lowest seat height (hard) 16 in (406 mm)
- Highest seat height (soft) 20.5 in (521 mm)
- Fixed seat depth (soft) 16.7 in (425 mm)
What this size’s grade covers
- Published 16–20.5 in standard seat-height range
- Minimum knee-clearance check using the published 16.75 in fixed retail seat depth
Size C
Size C · current U.S. consumer build · standard-height cylinder
- Lowest seat height (hard) 16 in (406 mm)
- Highest seat height (soft) 20.5 in (521 mm)
- Fixed seat depth (soft) 18.5 in (470 mm)
What this size’s grade covers
- Published 16–20.5 in standard seat-height range
- Minimum knee-clearance check using the published 18.5 in fixed retail seat depth
Not scored
- Usable seat-pan width (not published in current U.S. sources)
- Inside-arm spacing (not published in current U.S. sources)
- Back support, tilt, comfort, and preference
- Seat-pan support for longer thighs
- Low- and high-cylinder builds
- High-cylinder build
Manufacturer evidence
- Herman Miller Aeron retail configurator
- Herman Miller Aeron contract product sheet ©2026 — conflicting depth/cylinder context, not scored
- Herman Miller Aeron size/fit reference, February 2026
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