Google Nest Protect smoke + CO alarm (2nd gen) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/google-nest-protect-2nd-gen/  (sheet CC BY 4.0)
Basis: Manufacturer specifications (Google)
Catalog version: 2026-10-20

Overall (mm): length 134, width 134, height 38.5
- Google Nest Protect smoke + CO alarm (2nd gen) measures 134 × 134 × 38.5 mm (5.3 × 5.3 × 1.5 in) according to Google; height × width × depth of the alarm as published by Google (13.4 × 13.4 × 3.85 cm).
- Google lists one size for the 2nd gen alarm (battery entry); the wired model has no separate size entry.
- The file is a plain bounding box at the published size: the rounded-square body, centre button, light ring and mounting plate are not modelled.
- True size, no printing tolerance added. Only published numbers are used; anything not published is said so.

dimension  value
Height  134 mm (5.3 in)
Width  134 mm (5.3 in)
Depth  38.5 mm (1.5 in)
Weight  379 g (13.9 oz) battery model; 375 g (13.2 oz) wired model

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Google: Nest Protect technical specifications - Google Home and Nest Help — web — Publisher's page; dimensions are facts — https://support.google.com/googlehome/answer/9229922?hl=en

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/google-nest-protect-2nd-gen/index.json
API: https://xemstudio.com/api/geometry?object=google-nest-protect-2nd-gen