Herman Miller Aeron Size Guide: A vs B vs C
Aeron is unusual because one chair family is offered in three physical sizes. Size B covers the broadest range, while A and C shift seat dimensions and capacity for smaller and larger users.
Quick checks
- Size A seat height 14.4–19.3 in.
- Size B seat height 14.8–22.8 in.
- Size C seat height 15.8–22.8 in.
Sizing changes more than height
Seat depth increases from 16 inches on Size A to 17 inches on B and 18.5 inches on C. That changes thigh support and how the chair fits shorter or taller legs.
Use the manufacturer fit chart as a starting point
Herman Miller publishes overlapping user-height recommendations rather than hard cutoffs. Body proportions vary, so users near a boundary benefit from sitting in both adjacent sizes when possible.
How we use specifications
DeskVerdicts records published dimensions and limits as constraints, not quality scores. A higher load rating, wider height range or longer warranty can be useful, but the best fit depends on the equipment, room and user measurements involved.
Check the source-backed specification database →