Size Chart NORDIC (Ultra MTN Merino, DLX-Wool, IQ Fit Hybrid, DL-Wool, IQ Fit Thermo)
| Sock Size | US Men | US Women | Euro | Boot |
| S | 3-4.5 | 4-5.5 | 33-35 | 18.5-21 |
| M | 5-7.5 | 6-8.5 | 36-39 | 21.5-24.5 |
| L | 8-10 | 9-11 | 40-43 | 25-27 |
| XL | 10.5-12.5 | 11.5-13.5 | 44-47 | 27.5-30 |
| XXL | 13+ | 14+ | 48+ | 30.5+ |