Size Guide: Find Your Perfect Fit
Choosing the right size for your Formthotics is essential to achieving optimal support and comfort. Our size guide provides a clear breakdown for our Standard (Adult), Youth, and Junior ranges, making it easy to find the perfect fit based on the foot size and age range.
Adult range
Size
| XXS | XS | S | M | L | XL | XXL | XXXL* |
|---|---|---|---|---|---|---|---|---|
UK | 2.5 | 3 - 4.5 | 5 - 6.5 | 7 - 8 | 8.5 - 9.5 | 10 - 11.5 | 12 - 14 | 15 - 16 |
Euro | 35 | 35.5 | 38 - 40 | 40.5 - 42 | 42.5 - 44 | 44.5 - 46.5 | 47 - 50 | 51 - 53 |
US (Women) | 4 - 5 | 5.5 - 7 | 7.5 - 9 | 9.5 - 10.5 | 11 - 12 | — | — | — |
US (Men) | 4 - 5 | 5.5 - 6 | 6.5 - 7.5 | 8 - 9 | 9.5 - 10.5 | 11 - 12.5 | 13 - 15 | 16 - 17 |
Mondo Pt | 20 - 22.5 | 23 - 24 | 24.5 - 25.5 | 26 - 27 | 27.5 - 28.5 | 29 - 30 | 30.5 - 32 | 33 - 34 |
*only available in certain models
**Some sizes are not available in all ranges. Please contact us for more information.
Youth
Y1 | Y2 | Y3 | |
|---|---|---|---|
UK | 11 - 12 | 13 - 1 | 1.5 - 2.5 |
Euro | 29 - 30.5 | 31 - 32.5 | 33 - 35 |
US | 13 - 1.5 | 2 - 3.5 | 4 - 5 |
Mondo | 17 - 18.5 | 19 - 20.5 | 21 - 22.5 |
For young active users who need reliable support as they grow.
Junior
J1 | J2 | J3 | J4 | |
|---|---|---|---|---|
UK | 8 - 9.5 | 10 - 11.5 | 12 - 13.5 | 1 - 2 |
Euro | 25 - 27.5 | 28 - 29.5 | 30 - 32.5 | 33 - 34.5 |
US | 9 - 10.5 | 11 - 12.5 | 13 - 1.5 | 2 - 3.5 |
Foot length (cm) | 15 - 16.5 | 17 - 18 | 18.5 - 19.5 | 20 - 21 |
Approx age (girls) | 3 - 4 | 4.5 - 5.5 | 6 - 7.5 | 8 - 9 |
Approx age (boys) | 3 - 3.5 | 4 - 5 | 5.5 - 7 | 7.5 - 8 |
For younger children who require comfort and stability as they start their active journey.
How to buy
Ready to purchase Formthotics products? If you are a new customer, please complete the 'Become a Provider' form. Existing customers can contact us directly to place an order.