The rubber boots are more suitable for narrow to medium-width feet. The boots feature a removable insole, on which the manufacturer has printed a "happy feet" allowance of 1.5 cm. However, we do not recommend leaving such a large allowance, as the rubber boot does not stay securely on the foot, which could cause the child to drag their feet. The recommended growth allowance is 1.0–1.2 cm. A raised insole pad is glued under the insole, which can be easily removed.
| Size | Insole | |||
| Length (cm) | Width (cm) | Shaft height (cm) | Weight of one rubber boot (g) | |
| 22 | 14.1 | 5.5 | 14.5 | 249 |
| 23 | 14.9 | 6.0 | 14.5 | 257 |
| 24 | 15,7 | 6.2 | 17.5 | 297 |
| 25 | 16.3 | 6.3 | 17.5 | 306 |
| 26 | 17.0 | 6.5 | 17.5 | 320 |
| 27 | 17.7 | 6.9 | 17.5 | 326 |
| 28 | 18.3 | 6.9 | 19.0 | 362 |
| 29 | 19.1 | 6.9 | 19.0 | 381 |
| 30 | 19.8 | 7.2 | 19.5 | 406 |
| 31 | 20.4 | 7.5 | 19.5 | 411 |
| 32 | 20.8 | 7.519.5 | 21.0 | 461 |
| 33 | 21.7 | 7.8 | 21.0 | 464 |
The measurements are indicative and may vary slightly depending on the measurer. The measurements were taken by Lilz Kids and may differ from the manufacturer’s own data.
The shoe has been measured with a tape measure from the insole. Both in terms of length and width, it is noticeable that there are a few millimeters of extra space, meaning the insole is not the same size as the rubber boot's sole.
When choosing the right size, it's best not to leave too much extra room, as the rubber boot is not secured on the foot, which could cause the child to drag their feet. The recommended growth allowance is 1.0–1.2 cm, while the manufacturer's recommendation is 1.5 cm.
