WEMOS LOLIN D1 mini v4 (ESP8266) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/wemos-lolin-d1-mini-v4-esp8266/  (CC BY 4.0)
Basis: WEMOS (dimension drawing)
Catalog version: 2026-10-20

Overall (mm): length 25.4, width 34.3
- WEMOS LOLIN D1 mini v4 (ESP8266): 25.4 × 34.3 mm, 3 g. Drawing 34.3 × 25.4 mm; WEMOS's spec table says 34.2 × 25.6 mm. Header rows 22.86 mm apart on 2.54 mm pitch.
- Mounting holes: 2 × Ø2.0 mm on the top edge, first 2.5 mm from the left edge, 20.4 mm apart (vertical position not dimensioned).
- The file is the outline; components and connectors are not modelled.

dimension  value
size  25.4 × 34.3 mm (board outline)
mounting holes  2 × Ø2.0 mm on the top edge, first 2.5 mm from the left edge, 20.4 mm apart (vertical position not dimensioned)
weight  3 g

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- WEMOS: WEMOS LOLIN D1 mini v4 (ESP8266) — web — Publisher's page; dimensions are facts — https://github.com/wemos/docs/blob/master/docs/en/_static/files/dim_d1_mini_v4.0.0.pdf

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/wemos-lolin-d1-mini-v4-esp8266/index.json
API: https://xemstudio.com/api/geometry?object=wemos-lolin-d1-mini-v4-esp8266