BOBUX Pre-Walker Shoes
 EU |  UK |  USA | Supplier size | Approximate age |
| 16-17 | 0.5-1 | 1-1.5 | S | 3-9 month |
| 18-19 | 2-3 | 3-4 | M | 9-15 month |
| 20-21 | 3.5-4.5 | 4.5-5.5 | L | 15-21 month |
BOBUX Junior Shoes
| EU | UK | USA | Supplier size | Approximate age |
| 18 | 2 | 3 | M | 9-15 month |
| 19 | 3 | 4 | M | 9-15 month |
| 20 | 3.5 | 4.5 | L | 15-21 month |
| 21 | 4.5 | 5.5 | L | 15-21 month |
| 22 | 5 | 6 | XL | 2 year |
| 23 | 6 | 7 | XL | 2 year |
| 24 | 7 | 8 | 2XL | 2-3 year |
| 25 | 7.5 | 8.5 | 2XL | 2-3 year |
| 26 | 8.5 | 9.5 | 3XL | 3-4 year |
| 27 | 9 | 10 | 3XL | 3-4 year |
| 28 | 10 | 11 | 4XL | 4-5 year |
| 29 | 11 | 12 | 4XL | 4-5 year |
| 30 | 11.5 | 12.5 | 5XL | 5-6year |
| 31 | 12 | 13 | 5XL | 5-6year |
| 32 | 13 | 1 | 6XL | 6-7year |
| 33 | 1 | 1.5 | 6XL | 6-7year |