# Adafruit Metro Mini 328

> What are the Adafruit Metro Mini 328 dimensions and hole positions?

- Category: Electronics › Microcontroller boards · 2016
- Kind: Modern device
- Basis: Adafruit's Eagle board file (Rev B) and the V2 product page
- Page: https://xemstudio.com/objects/adafruit-metro-mini-328/ · JSON: https://xemstudio.com/api/geometry?object=adafruit-metro-mini-328 · Plain text: https://xemstudio.com/objects/adafruit-metro-mini-328/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width | height |
|---|---|---|
| 43.18 | 17.78 | 4.9 |

Mounting holes: 4 × Ø2.2 mm, pattern 39.1–39.4 x 13.97 (asymmetric, see notes) mm, M2

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- Board file outline 43.18 × 17.78 mm; the V2 product page gives 44.3 × 17.8 × 4.9 mm overall.
- Four 2.2 mm holes from the board file (origin bottom-left): (1.905, 1.905), (1.905, 15.875), (41.021, 1.905), (41.275, 15.875).
- Headers on 2.54 mm pitch, rows 15.24 mm (0.6 in) apart: breadboard friendly. Rev B has micro-USB, V2 USB-C.

## Where the files are

- Adafruit (official): [Adafruit METRO 328 PCB (Eagle files)](https://github.com/adafruit/Adafruit-METRO-328-PCB) — BRD, SCH — Adafruit open hardware
- Adafruit (official): [Metro Mini 328 V2 product page](https://www.adafruit.com/product/5597) — web — Manufacturer documentation

## Questions

**How big is the Adafruit Metro Mini 328?**

43.18 × 17.78 mm (1.70 × 0.70 in), 4.9 mm thick overall.

## Fits with

- [Adafruit Metro (Uno form factor), Metro Mini and Grand Central (Mega form factor)](https://xemstudio.com/objects/adafruit-metro-grand-central/)
- [Arduino Nano (classic and Nano Every)](https://xemstudio.com/objects/arduino-nano/)