Footwear
| US Women | US Men | UK | EUR | JP | Inches |
| 5 | 3 | 36 | 22 | 9.21" | |
| 6 | 4 | 37 | 23 | 9.54" | |
| 7 | 6 | 5 | 38 | 23.5 | 9.88" |
| 8 | 7 | 6 | 39 | 24.5 | 10.21" |
| 9 | 8 | 7 | 41 | 25.5 | 10.55" |
| 10 | 9 | 8 | 42 | 26 | 10.88" |
| 11 | 10 | 9 | 43 | 27 | 11.22" |
Socks
| Size | S/M | M/L |
| US WOMEN | 5-10 | 11-16 |
| US MEN | 4-9 | 10-15 |
Footwear
| US Men | US Women | UK | EUR | JP | Inches |
| 4 | 5 | 3 | 36 | 22 | 9.35" |
| 5 | 6 | 4 | 37 | 23 | 9.68" |
| 6 | 7 | 5 | 38 | 23.5 | 10.02" |
| 7 | 8 | 6 | 39 | 24.5 | 10.35" |
| 8 | 9 | 7 | 41 | 25.5 | 10.68" |
| 9 | 10 | 8 | 42 | 26 | 11.02" |
| 10 | 11 | 9 | 43 | 27 | 11.34" |
| 11 | 12 | 10 | 45 | 28 | 11.69" |
| 12 | 11 | 46 | 29 | 12.03" | |
| 13 | 12 | 47 | 29.5 | 12.36" | |
| 14 | 13 | 48 | 12.70" | ||
| 15 | 14 | 49.5 | 13.03" | ||
| 16 | 15 | 51 | 13.36" |
Socks
| Size | S/M | M/L |
| US MEN | 4-9 | 10-15 |
| US WOMEN | 5-10 | 11-16 |
Youth Footwear (Big Kids)
| US Kids | UK | EUR | JP | Inches |
| 5 | 4 | 37 | 23 | 9.54" |
| 6 | 5 | 38 | 23.5 | 9.88" |
Junior Footwear (Little Kids)
| US Kids | UK | EUR | JP | Inches |
| 11 | 10 | 28 | 17 | 7.2" |
| 12 | 11 | 29 | 11 | 7.53" |
| 13 | 12 | 31 | 18.5 | 7.87" |
| 1 | 13 | 32 | 19.5 | 8.20" |
| 2 | 1 | 33 | 20.5 | 8.54" |
| 3 | 2 | 34 | 21.5 | 8.86" |
| 4 | 3 | 36 | 22 | 9.21" |
Toddler Footwear
| US Kids | Age (Approx) | UK | EUR | JP | Inches |
| 7 | 18-24 Months | 6 | 23 | 13.5 | 5.86" |
| 8 | 2 Years | 7 | 23.5 | 14 | 6.20" |
| 9 | 3 Years | 8 | 26 | 15 | 6.53" |
| 10 | 4 Years | 9 | 27 | 16 | 6.87" |
Infant Footwear
| US Kids | Age (Approx) | UK | EUR | JP | Inches |
| 4 | 12-18 Months | 3 | 19 | 11 | 4.86" |
| 5 | 12-18 Months | 4 | 20 | 12 | 5.19" |
| 6 | 18-24 Months | 5 | 21.5 | 12.5 | 5.53" |
Newborn Footwear
| US Kids | Age (Approx) | UK | EUR | JP | Inches |
| 1 | 0-3 Months | 0 | 16 | 8 | 3.82" |
| 2 | 3-6 Months | 1 | 17 | 9 | 4.15" |
| 3 | 6-9 Months | 2 | 18 | 10 | 4.49" |
| 4 | 9-12 Months | 3 | 19 | 11 | 4.82" |