Herman Miller Cosm Mid Back vs Herman Miller Aeron

Side by side from official specifications, sourced prices and User Insights. No written comparison exists for this pair yet.

Herman Miller

Herman Miller Cosm Mid Back

$2,030

Herman Miller

Herman Miller Aeron

$1,775 – $2,840

$255

lower starting price for Herman Miller Aeron than Herman Miller Cosm Mid Back at the brand stores

Differences at a glance

Herman Miller Cosm Mid BackHerman Miller Aeron

Price: $2,030$1,775 – $2,840
Seat height: 14.875–21 in14.4–19.3 in (36.6–49 cm); 14.8–22.8 in (37.6–57.9 cm); 15.8–22.8 in (40.1–57.9 cm)
Seat depth: 15.5 in16 / 17 / 18.5 in (40.6 / 43.2 / 47.0 cm)
Load capacity: 350 lb300 / 350 / 400 lb (136 / 158.8 / 181.4 kg)
Warranty: 12 years12-year, 3-shift warranty, with limited exceptions

Which is cheaper, the Herman Miller Cosm Mid Back or the Herman Miller Aeron?

The Herman Miller Aeron is cheaper to start: $1,775 versus $2,030 for the Herman Miller Cosm Mid Back at the brand stores (Oct 2026).