O-rings, common metric sizes (ISO 3601) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/o-rings-metric/  (CC BY 4.0)
Basis: ISO 3601; groove rules of thumb for static face seals
Catalog version: 2026-10-20

Sizes: see table below
- Cross-sections (CS) are standardized: 1.0, 1.5, 1.78, 2.0, 2.4, 2.62, 3.0, 3.53 mm. Inside diameter is nearly continuous.
- Static face-seal groove: depth = 0.75 × CS, width = 1.35 × CS, so the ring is squeezed ~25% and has room to spread. Printed grooves: smooth the floor (ironing or sand) or it won't seal.

cross_section_mm  groove_depth_mm  groove_width_mm
1.5  1.1  2.0
1.78  1.35  2.4
2.0  1.5  2.7
2.4  1.8  3.2
2.62  2.0  3.5
3.0  2.25  4.0
3.53  2.65  4.8

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- McMaster-Carr: O-rings (free STEP/IGES/STL per part, for your own design use; no redistribution) — STEP, IGES, STL, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/products/o-rings/
- Wikipedia: O-ring — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/O-ring

Xem Studio scan: not needed; this is a published standard. The sheet is the geometry.
API: https://xemstudio.com/api/geometry?object=o-rings-metric