Seeed Studio XIAO nRF52840 — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/seeed-xiao-nrf52840/  (CC BY 4.0)
Basis: Seeed Studio wiki (board size); outline DXF on the same page
Catalog version: 2026-10-20

Overall (mm): length 21.0, width 17.8
- XIAO nRF52840: 21 × 17.8 mm, USB-C on one short edge, castellated pads on both long edges.
- Every XIAO shares this outline, so one enclosure or carrier fits all of them; check component height and antenna position per variant.
- Seeed publishes the outline as a DXF on the wiki page; thickness and pad positions are not given in text.

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Seeed Studio (official): XIAO nRF52840 getting started (specifications) — web — Manufacturer documentation — https://wiki.seeedstudio.com/XIAO_BLE/

Xem Studio scan: not planned; the official CAD above covers it.
API: https://xemstudio.com/api/geometry?object=seeed-xiao-nrf52840