# Seeed Studio XIAO (all variants)

> What are the Seeed XIAO board dimensions?

- Category: Electronics › Microcontroller boards · 2020
- Kind: Modern device
- Basis: published spec and STEP
- Page: https://xemstudio.com/objects/seeed-xiao/ · JSON: https://xemstudio.com/api/geometry?object=seeed-xiao · Plain text: https://xemstudio.com/objects/seeed-xiao/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses

## Overall (mm)

| length | width |
|---|---|
| 21 | 17.5 |

## Notes

- Thumb-sized; USB-C on one short edge; 7 castellated pads per long edge on 2.54 mm pitch.
- All XIAO variants share the outline, so one enclosure fits every chip.

## Where the files are

- Seeed Studio (official): [XIAO ESP32C3 wiki (dimensions, STEP download)](https://wiki.seeedstudio.com/XIAO_ESP32C3_Getting_Started/) — STEP, PDF — see page (verify at link)

## Questions

**What are the Seeed Studio XIAO (all variants) dimensions in mm?**

21 × 17.5 mm (length × width × height). Thumb-sized; USB-C on one short edge; 7 castellated pads per long edge on 2.54 mm pitch.

**Where is the official CAD for the Seeed Studio XIAO (all variants)?**

Seeed Studio (official): XIAO ESP32C3 wiki (dimensions, STEP download) (STEP, PDF, see page). Linked from the sheet; Xem Studio does not rehost it.

## Fits with

- [Adafruit Feather (standard form factor)](https://xemstudio.com/objects/adafruit-feather/)
- [Arduino Nano (classic and Nano Every)](https://xemstudio.com/objects/arduino-nano/)
- [USB-C receptacle (16/24-pin, mid-mount)](https://xemstudio.com/objects/usb-c-receptacle/)