Sidas Size Chart
Insoles
| Sidas Size | US (M's) | US (W's) | Mondo (cm) | EUR | UK |
| XS | 3-4 | 5 - 6.5 | 22-23 | 35-36 | 2-3 |
| S | 5-6 | 6.5 - 7.5 | 23½-24½ | 37-38 | 4-5 |
| M | 7-8 | 8 - 9.5 | 25-26½ | 39-41 | 6-7 |
| L | 9-10 | 10 - 11 | 27-28 | 42-43 | 8-9 |
| XL | 11-12 | 28½-29½ | 44-45 | 10-11 | |
| XXL | 13/14 | 30-32 | 46-48 | 12-13 |
Socks
| Sidas Size | US | Mondo (cm) |
| S (1) | 3-5 | 22-24 |
| M (2) | 6-7 | 24½-26 |
| L (3) | 8-10 | 26½-28 |
| XL (4) | 11-12 | 28½-29½ |
Ski Boot Liners
| Sidas Size | US (M's) | Mondo (cm) |
| C | 3 | 22-22½ |
| D | 4-5 | 23-23½ |
| E | 5-6 | 24-24½ |
| F | 7 | 25-25½ |
| G | 8 | 26-26½ |
| H | 9-10 | 27-27½ |
| I | 10-11 | 28-28½ |
| J | 11½-12 | 29-29½ |
| K | 13 | 30-30½ |
| L | 14 | 31-31½ |