Width × height in mm.
| Outside | Usable inside |
| 70 × 90 | 70 × 70 |
| 90 × 120 | 90 × 100 |
| 100 × 150 | 100 × 125 |
| 110 × 160 | 110 × 135 |
| 130 × 180 | 130 × 155 |
| 150 × 200 | 150 × 175 |
| 170 × 230 | 170 × 205 |
| 200 × 300 | 200 × 270 |
| 250 × 350 | 250 × 305 |
| 300 × 400 | 300 × 350 |
| 350 × 500 | 350 × 450 |
Allow extra room for your item's thickness. Handmade dimensions may vary by approximately 5–10 mm.