Footwear
| UK | USA | Europe | Japan |
| 3 | 5 | 36 | 22 |
| 4 | 6 | 37 | 23 |
| 5 | 7 | 38 | 23.5 |
| 6 | 8 | 39 | 24.5 |
| 6.5 | 8.5 | 40 | 25 |
| 7 | 9 | 41 | 25.5 |
| 8 | 10 | 42 | 26 |
| 9 | 11 | 43 | 27 |
Clothing
| Size | XXS | XS | S | M | L | XL |
| UK | 6 | 8 | 10 | 12 | 14 | 16 |
| USA | 2 | 4 | 6 | 8 | 10 | 12 |
| Japan | 5 | 7 | 9 | 11 | 13 | 15 |
| Bust (cm) | 80 | 84 | 88 | 92 | 98 | 104 |
| Bust (in) | 31.5 | 33 | 34.5 | 36 | 38.5 | 40 |
| Waist (cm) | 62 | 66 | 70 | 74 | 80 | 86 |
| Waist (in) | 24.5 | 26 | 27.5 | 29 | 31.5 | 34 |
| Low hip (cm) | 86 | 90 | 94 | 98 | 104 | 110 |
| Low hip (in) | 34 | 35 | 37 | 38.5 | 41 | 43 |
Unisex for Women
| Size | XXS | XS | S | M | L | XL |
| UK | 6 | 8 | 10 | 12 | 14 | 16 |
| USA | 2 | 4 | 6 | 8 | 10 | 12 |
| Japan | 5 | 7 | 9 | 11 | 13 | 15 |
| Chest (cm) | 80 | 84 | 88 | 92 | 98 | 104 |
| Chest (in) | 31.5 | 33 | 34.5 | 36 | 38.5 | 40 |
Belts
| Size | S | M | L | XL |
| Fits (in) | 27-31 | 32-36 | 37-40 | 41-44 |
| Fits (cm) | 68-78 | 81-92 | 94-102 | 104-112 |
Socks
| Size | S/M | M/L |
| EU | 36-41 | 41.5-48 |
| UK | 3-7.5 | 8-13 |
Footwear
| UK | USA | Europe | Japan |
| 6 | 7 | 39 | 24.5 |
| 6.5 | 7.5 | 40 | 25 |
| 7 | 8 | 41 | 25.5 |
| 8 | 9 | 42 | 26 |
| 9 | 10 | 43 | 27 |
| 9.5 | 10.5 | 44 | 27.5 |
| 10 | 11 | 45 | 28 |
| 11 | 12 | 46 | 29 |
| 12 | 13 | 47 | 29.5 |
| 13 | 14 | 48 | |
| 14 | 15 | 49.5 | |
| 15 | 16 | 51 |
Clothing
| Size | XXS | XS | S | M | L | XL |
| Chest (cm) | 86 | 92 | 97 | 102 | 107 | 112 |
| Chest (in) | 34 | 36 | 38 | 40 | 42 | 44 |
| Waist (cm) | 71 | 76 | 81 | 86 | 91 | 96 |
| Waist (in) | 28 | 30 | 32 | 34 | 36 | 38 |
Unisex for Men
| Size | XXS | XS | S | M | L | XL |
| Chest (cm) | 86 | 92 | 97 | 102 | 107 | 112 |
| Chest (in) | 34 | 36 | 38 | 40 | 42 | 44 |
Belts
| Size | S | M | L | XL |
| Fits (in) | 27-31 | 32-36 | 37-40 | 41-44 |
| Fits (cm) | 68-78 | 81-92 | 94-102 | 104-112 |
Socks
| Size | S/M | M/L |
| EU | 36-41 | 41.5-48 |
| UK | 3-7.5 | 8-13 |
Newborn Footwear
| All Countries | Size 0 = 0-3months | Size 1 = 3-6months | Size 2 = 6-9months | Size 3 = 9-12months |
Toddler Footwear
| UK | USA | Europe | Japan |
| 3 | 4 | 19 | 11 |
| 3.5 | 4.5 | 19.5 | 11.5 |
| 4 | 5 | 20 | 12 |
| 4.5 | 5.5 | 21 | 12.5 |
| 5 | 6 | 21.5 | 12.5 |
| 5.5 | 6.5 | 22 | 13.5 |
| 6.5 | 7.5 | 23.5 | 14 |
| 7 | 8 | 24 | 14.5 |
| 7.5 | 8.5 | 25 | 15 |
| 8 | 9 | 26 | 15 |
| 8.5 | 9.5 | 15.5 | |
| 9 | 10 | 27 | 16 |
Junior Footwear
| UK | USA | Europe | Japan |
| 10 | 11 | 28 | 17 |
| 10.5 | 11.5 | 28.5 | 17.5 |
| 11 | 12 | 29 | 11 |
| 11.5 | 12.5 | 30 | 11.5 |
| 12 | 13 | 31 | 18.5 |
| 12.5 | 13.5 | 19 | |
| 13 | 1 | 32 | 19.5 |
| 13.5 | 1.5 | 32.5 | 20 |
| 1 | 2 | 33 | 20.5 |
| 1.5 | 2.5 | 33.5 | 21 |
| 2 | 3 | 34 | 21.5 |
| 2.5 | 3.5 | 35 | 21.5 |
| 3 | 4 | 36 | 22 |