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QR code sizes in beads
Every QR version adds 4 modules per side. Add the white border (quiet zone) on both sides to get the full bead count.
| QR version | Modules | With 2-bead border | Midi beads (5 mm) |
|---|---|---|---|
| 1 | 21 × 21 | 25 × 25 | 12.5 cm |
| 2 | 25 × 25 | 29 × 29 — one board | 14.5 cm |
| 3 | 29 × 29 | 33 × 33 | 16.5 cm |
| 4 | 33 × 33 | 37 × 37 | 18.5 cm |
