Biomecanics Kids Size Chart & Fit Guide (UK, EU & cm)
Developed in collaboration with the Valencia Biomechanics Institute (IBV), Biomecanics creates specialist children's footwear engineered to support natural physiological gait development. From early crawling stages to school steps, use our official UK to European size conversion table, foot length centimetre (cm) measurements, and developmental fit guidance below.
Are Biomecanics Shoes True to Size? Quick Reference:
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Fit Standard: Biomecanics shoes fit true to European size with an anatomical, wide toe box designed to let growing toes spread naturally.
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Biogateo (Crawling to First Walkers, EU 18–24): Features lateral external stabilisers to support balance without restricting ankle flexion. Measure foot length standing and select the closest true size.
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Bioevolution (Toddlers to School, EU 24–32): Engineered for active running and jumping, with protective toe guards and flexible, lightweight outsoles.
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Growing Room Allowance: Keep clearance between 0.8 cm and 1.0 cm at the front. Over-sizing first walkers can lead to stumbling and hinder early balance.
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Popular Conversions: UK 2.5 = EU 18 (10.7 cm) | UK 3 = EU 19 (11.4 cm) | UK 4 = EU 20 (12.0 cm) | UK 4.5 = EU 21 (12.7 cm) | UK 5.5 = EU 22 (13.4 cm) | UK 6 = EU 23 (14.0 cm) | UK 7 = EU 24 (14.7 cm) | UK 8 = EU 25 (15.4 cm) | UK 8.5 = EU 26 (16.0 cm) | UK 9 = EU 27 (16.7 cm) | UK 10 = EU 28 (17.4 cm) | UK 11 = EU 29 (18.0 cm) | UK 12 = EU 30 (18.7 cm).
Biomecanics Children's Footwear Size Conversion Table
| UK Size |
Biomecanics EU |
Category |
Foot Length (cm) |
| 2.5 |
18 |
Biogateo (First Steps) |
10.7 cm |
| 3 |
19 |
Biogateo (First Steps) |
11.4 cm |
| 4 |
20 |
Biogateo (First Steps) |
12.0 cm |
| 4.5 |
21 |
Biogateo (First Steps) |
12.7 cm |
| 5.5 |
22 |
Biogateo (First Steps) |
13.4 cm |
| 6 |
23 |
Biogateo (First Steps) |
14.0 cm |
| 7 |
24 |
Biogateo / Bioevolution |
14.7 cm |
| 8 |
25 |
Bioevolution (Junior) |
15.4 cm |
| 8.5 |
26 |
Bioevolution (Junior) |
16.0 cm |
| 9 |
27 |
Bioevolution (Junior) |
16.7 cm |
| 10 |
28 |
Bioevolution (Junior) |
17.4 cm |
| 11 |
29 |
Bioevolution (Junior) |
18.0 cm |
| 12 |
30 |
Bioevolution (Junior) |
18.7 cm |
| 12.5 |
31 |
Bioevolution (Junior) |
19.4 cm |
| 13 |
32 |
Bioevolution (Junior) |
20.0 cm |
Need help checking your child's first steps or choosing the right Biomecanics shoe size? Contact Walsh Brothers Shoes at
support@wbs.ie, call
+353 (0)66 7124122, or visit us in Tralee, Co. Kerry.
