# Micro QR code

> Micro QR is a smaller variant defined in the same standard, ranging from 11 × 11 to 17 × 17 modules with a single finder pattern and a two-module quiet zone. It holds far less data but fits where a standard code cannot.

Source: https://useqr.app/glossary/micro-qr · Last reviewed 2026-08-21 · UseQR is free forever, MIT licensed, no signup.

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## The four sizes

| Type | Modules | Max numeric | Max byte |
|---|---|---|---|
| M1 | 11 × 11 | 5 | — |
| M2 | 13 × 13 | 10 | — |
| M3 | 15 × 15 | 23 | 9 |
| M4 | 17 × 17 | 35 | 15 |

M1 and M2 support numeric and alphanumeric only.

## Differences from standard QR

One finder pattern instead of three. Quiet zone of two modules instead of four. Reduced
error-correction options. No structured append.

## Where it is used

Electronic components, small medical devices, jewellery tags — anywhere the marking area is
a few millimetres. Support on phone cameras is inconsistent; industrial scanners handle it
reliably. Do not choose Micro QR for anything a consumer will scan.