Our products follow the usual standards, but if you have any doubts about the size that will best adapt to your children's feet or your baby's first steps, here are the most common questions and our Size Guide.
There may be slight size variations between different references, therefore Biomecanics cannot be held responsible for the results of the measurements in this table when applied to a specific article.
Do the measurements in the table apply to all the models available in the online store?
Please note that all measurements are approximate. Fit may vary slightly depending on the model, so some styles may not match the measurements in the table exactly.
- Canvas: These may run slightly larger. We recommend choosing your child’s usual size.
- Biohome: These may also run slightly larger, similar to canvas sandals.
- BIOAQUA: Our beach and pool styles have a roomier fit. We recommend choosing your child’s usual size as a maximum — never a larger one.
- Barefoot: Our Wider line offers a broader fit. See more information
Do I have to leave 1 cm extra when selecting the size?
- Our sizes already allow enough room for the foot to fit correctly inside the shoe.
- The Biomecanics Biogateo Line has a silhouette drawn on the insole. The foot must fit inside the silhouette when using this footwear for the first time.
Recommendations for choosing the right size
- Shoes should not be too tight or too small, as this prevents toes from stretching naturally and may affect foot development.
- Shoes should not be too large either, as the foot may move excessively and cause chafing.
- Always try footwear on both feet, since one foot may grow faster than the other.
- The child should wear socks similar to those they will normally use with the shoes.

Recommended frequency for changing/checking footwear
| Kid age (years) | Recommended shoe change/check frequency |
|---|---|
| 0 - 1.5 | every 2 monthss |
| 1.5 - 2.5 | every 3 months |
| 2,5 - 4 | every 4 months |
| 4 - 6 | every 6 months |
| 7 - 9 | every 3-4 months |
| 10 - 20 | very variable, every 4 - 6 months |