Size Guide
Every pair on Project Sneakers is listed in UK sizing. Use the charts below to convert to EU and US for your chosen brand — sizing runs slightly differently between brands, so always check the right table.
Find your size: stand on a sheet of paper, mark heel to longest toe, and measure the length in cm. Match it to the Foot length column for the most accurate fit. If you're between sizes or the shoe is a snug silhouette, size up.
Every table below shows both US Men's and US Women's. UK and EU are the same for men's and women's — only the US number differs (women's = men's + 1.5).
Nike & Air Jordan
Air Jordan uses the same sizing as Nike. Nike tends to run slightly narrow — if between sizes, size up.
| UK | EU | US Men's | US Women's | Foot length |
|---|---|---|---|---|
| UK 2.5 | EU 35 | US 3 | US 4.5 | 21.2 cm |
| UK 3 | EU 35.5 | US 3.5 | US 5 | 21.6 cm |
| UK 3.5 | EU 36 | US 4 | US 5.5 | 22.0 cm |
| UK 4 | EU 36.5 | US 4.5 | US 6 | 22.4 cm |
| UK 4.5 | EU 37.5 | US 5 | US 6.5 | 22.9 cm |
| UK 5 | EU 38 | US 5.5 | US 7 | 23.3 cm |
| UK 5.5 | EU 38.5 | US 6 | US 7.5 | 23.7 cm |
| UK 6 | EU 40 | US 7 | US 8.5 | 24.1 cm |
| UK 6.5 | EU 40.5 | US 7.5 | US 9 | 24.6 cm |
| UK 7 | EU 41 | US 8 | US 9.5 | 25.0 cm |
| UK 7.5 | EU 42 | US 8.5 | US 10 | 25.4 cm |
| UK 8 | EU 42.5 | US 9 | US 10.5 | 25.8 cm |
| UK 8.5 | EU 43 | US 9.5 | US 11 | 26.3 cm |
| UK 9 | EU 44 | US 10 | US 11.5 | 26.7 cm |
| UK 9.5 | EU 44.5 | US 10.5 | US 12 | 27.1 cm |
| UK 10 | EU 45 | US 11 | US 12.5 | 27.5 cm |
| UK 10.5 | EU 45.5 | US 11.5 | US 13 | 27.9 cm |
| UK 11 | EU 46 | US 12 | US 13.5 | 28.4 cm |
| UK 11.5 | EU 47 | US 12.5 | US 14 | 28.8 cm |
| UK 12 | EU 47.5 | US 13 | US 14.5 | 29.2 cm |
| UK 12.5 | EU 48 | US 13.5 | US 15 | 29.6 cm |
| UK 13 | EU 48.5 | US 14 | US 15.5 | 30.1 cm |
| UK 13.5 | EU 49 | US 14.5 | US 16 | 30.5 cm |
| UK 14 | EU 49.5 | US 15 | US 16.5 | 30.9 cm |
| UK 15 | EU 50.5 | US 16 | US 17.5 | 31.8 cm |
adidas & Yeezy
Yeezy follows adidas sizing. adidas can run about half a size small.
| UK | EU | US Men's | US Women's | Foot length |
|---|---|---|---|---|
| UK 3.5 | EU 36 | US 4 | US 5.5 | 22.0 cm |
| UK 4 | EU 36 2/3 | US 4.5 | US 6 | 22.4 cm |
| UK 4.5 | EU 37 1/3 | US 5 | US 6.5 | 22.9 cm |
| UK 5 | EU 38 | US 5.5 | US 7 | 23.3 cm |
| UK 5.5 | EU 38 2/3 | US 6 | US 7.5 | 23.7 cm |
| UK 6 | EU 39 1/3 | US 6.5 | US 8 | 24.1 cm |
| UK 6.5 | EU 40 | US 7 | US 8.5 | 24.6 cm |
| UK 7 | EU 40 2/3 | US 7.5 | US 9 | 25.0 cm |
| UK 7.5 | EU 41 1/3 | US 8 | US 9.5 | 25.4 cm |
| UK 8 | EU 42 | US 8.5 | US 10 | 25.8 cm |
| UK 8.5 | EU 42 2/3 | US 9 | US 10.5 | 26.3 cm |
| UK 9 | EU 43 1/3 | US 9.5 | US 11 | 26.7 cm |
| UK 9.5 | EU 44 | US 10 | US 11.5 | 27.1 cm |
| UK 10 | EU 44 2/3 | US 10.5 | US 12 | 27.5 cm |
| UK 10.5 | EU 45 1/3 | US 11 | US 12.5 | 27.9 cm |
| UK 11 | EU 46 | US 11.5 | US 13 | 28.4 cm |
| UK 11.5 | EU 46 2/3 | US 12 | US 13.5 | 28.8 cm |
| UK 12 | EU 47 1/3 | US 12.5 | US 14 | 29.2 cm |
| UK 12.5 | EU 48 | US 13 | US 14.5 | 29.6 cm |
| UK 13 | EU 48 2/3 | US 13.5 | US 15 | 30.1 cm |
| UK 13.5 | EU 49 1/3 | US 14 | US 15.5 | 30.5 cm |
| UK 14 | EU 50 | US 14.5 | US 16 | 30.9 cm |
| UK 15 | EU 51 1/3 | US 16 | US 17.5 | 31.8 cm |
New Balance
Also covers On, Saucony, Puma, Vans, Salomon, Timberland & Hoka (same fit convention).
| UK | EU | US Men's | US Women's | Foot length |
|---|---|---|---|---|
| UK 3 | EU 35.5 | US 3.5 | US 5 | 21.6 cm |
| UK 3.5 | EU 36 | US 4 | US 5.5 | 22.0 cm |
| UK 4 | EU 37 | US 4.5 | US 6 | 22.4 cm |
| UK 4.5 | EU 37.5 | US 5 | US 6.5 | 22.9 cm |
| UK 5 | EU 38 | US 5.5 | US 7 | 23.3 cm |
| UK 5.5 | EU 38.5 | US 6 | US 7.5 | 23.7 cm |
| UK 6 | EU 39.5 | US 6.5 | US 8 | 24.1 cm |
| UK 6.5 | EU 40 | US 7 | US 8.5 | 24.6 cm |
| UK 7 | EU 40.5 | US 7.5 | US 9 | 25.0 cm |
| UK 7.5 | EU 41.5 | US 8 | US 9.5 | 25.4 cm |
| UK 8 | EU 42 | US 8.5 | US 10 | 25.8 cm |
| UK 8.5 | EU 42.5 | US 9 | US 10.5 | 26.3 cm |
| UK 9 | EU 43 | US 9.5 | US 11 | 26.7 cm |
| UK 9.5 | EU 44 | US 10 | US 11.5 | 27.1 cm |
| UK 10 | EU 44.5 | US 10.5 | US 12 | 27.5 cm |
| UK 10.5 | EU 45 | US 11 | US 12.5 | 27.9 cm |
| UK 11 | EU 45.5 | US 11.5 | US 13 | 28.4 cm |
| UK 11.5 | EU 46.5 | US 12 | US 13.5 | 28.8 cm |
| UK 12 | EU 47 | US 12.5 | US 14 | 29.2 cm |
| UK 12.5 | EU 47.5 | US 13 | US 14.5 | 29.6 cm |
| UK 13 | EU 48.5 | US 14 | US 15.5 | 30.1 cm |
| UK 14 | EU 49.5 | US 15 | US 16.5 | 30.9 cm |
| UK 15 | EU 50.5 | US 16 | US 17.5 | 31.8 cm |
ASICS
ASICS run true to size for most models.
| UK | EU | US Men's | US Women's | Foot length |
|---|---|---|---|---|
| UK 3 | EU 36 | US 4 | US 5.5 | 21.6 cm |
| UK 3.5 | EU 37 | US 4.5 | US 6 | 22.0 cm |
| UK 4 | EU 37.5 | US 5 | US 6.5 | 22.4 cm |
| UK 4.5 | EU 38 | US 5.5 | US 7 | 22.9 cm |
| UK 5 | EU 39 | US 6 | US 7.5 | 23.3 cm |
| UK 5.5 | EU 39.5 | US 6.5 | US 8 | 23.7 cm |
| UK 6 | EU 40 | US 7 | US 8.5 | 24.1 cm |
| UK 6.5 | EU 40.5 | US 7.5 | US 9 | 24.6 cm |
| UK 7 | EU 41.5 | US 8 | US 9.5 | 25.0 cm |
| UK 7.5 | EU 42 | US 8.5 | US 10 | 25.4 cm |
| UK 8 | EU 42.5 | US 9 | US 10.5 | 25.8 cm |
| UK 8.5 | EU 43 | US 9.5 | US 11 | 26.3 cm |
| UK 9 | EU 44 | US 10 | US 11.5 | 26.7 cm |
| UK 9.5 | EU 44.5 | US 10.5 | US 12 | 27.1 cm |
| UK 10 | EU 45 | US 11 | US 12.5 | 27.5 cm |
| UK 10.5 | EU 45.5 | US 11.5 | US 13 | 27.9 cm |
| UK 11 | EU 46.5 | US 12 | US 13.5 | 28.4 cm |
| UK 11.5 | EU 47 | US 12.5 | US 14 | 28.8 cm |
| UK 12 | EU 47.5 | US 13 | US 14.5 | 29.2 cm |
| UK 13 | EU 49 | US 14 | US 15.5 | 30.1 cm |
| UK 14 | EU 50.5 | US 15 | US 16.5 | 30.9 cm |
| UK 15 | EU 51.5 | US 16 | US 17.5 | 31.8 cm |
UGG
UGG run large — if between sizes, size down.
| UK | EU | US Men's | US Women's | Foot length |
|---|---|---|---|---|
| UK 3 | EU 37 | US 4 | US 5.5 | 21.6 cm |
| UK 3.5 | EU 37.5 | US 4.5 | US 6 | 22.0 cm |
| UK 4 | EU 38 | US 5 | US 6.5 | 22.4 cm |
| UK 4.5 | EU 38.5 | US 5.5 | US 7 | 22.9 cm |
| UK 5 | EU 39 | US 6 | US 7.5 | 23.3 cm |
| UK 5.5 | EU 39.5 | US 6.5 | US 8 | 23.7 cm |
| UK 6 | EU 40 | US 7 | US 8.5 | 24.1 cm |
| UK 6.5 | EU 40.5 | US 7.5 | US 9 | 24.6 cm |
| UK 7 | EU 41 | US 8 | US 9.5 | 25.0 cm |
| UK 7.5 | EU 41.5 | US 8.5 | US 10 | 25.4 cm |
| UK 8 | EU 42 | US 9 | US 10.5 | 25.8 cm |
| UK 8.5 | EU 42.5 | US 9.5 | US 11 | 26.3 cm |
| UK 9 | EU 43 | US 10 | US 11.5 | 26.7 cm |
| UK 9.5 | EU 43.5 | US 10.5 | US 12 | 27.1 cm |
| UK 10 | EU 44 | US 11 | US 12.5 | 27.5 cm |
| UK 10.5 | EU 44.5 | US 11.5 | US 13 | 27.9 cm |
| UK 11 | EU 45 | US 12 | US 13.5 | 28.4 cm |
| UK 12 | EU 46 | US 13 | US 14.5 | 29.2 cm |
| UK 13 | EU 48.5 | US 14 | US 15.5 | 30.1 cm |
Converse
Converse run about half a size large — consider sizing down.
| UK | EU | US Men's | US Women's | Foot length |
|---|---|---|---|---|
| UK 3 | EU 35.5 | US 3.5 | US 5 | 21.6 cm |
| UK 3.5 | EU 36 | US 4 | US 5.5 | 22.0 cm |
| UK 4 | EU 37 | US 4.5 | US 6 | 22.4 cm |
| UK 4.5 | EU 37.5 | US 5 | US 6.5 | 22.9 cm |
| UK 5 | EU 38 | US 5.5 | US 7 | 23.3 cm |
| UK 5.5 | EU 38.5 | US 6 | US 7.5 | 23.7 cm |
| UK 6 | EU 40 | US 7 | US 8.5 | 24.1 cm |
| UK 6.5 | EU 40.5 | US 7.5 | US 9 | 24.6 cm |
| UK 7 | EU 41 | US 8 | US 9.5 | 25.0 cm |
| UK 7.5 | EU 42 | US 8.5 | US 10 | 25.4 cm |
| UK 8 | EU 42.5 | US 9 | US 10.5 | 25.8 cm |
| UK 8.5 | EU 43 | US 9.5 | US 11 | 26.3 cm |
| UK 9 | EU 44 | US 10 | US 11.5 | 26.7 cm |
| UK 9.5 | EU 44.5 | US 10.5 | US 12 | 27.1 cm |
| UK 10 | EU 45 | US 11 | US 12.5 | 27.5 cm |
| UK 10.5 | EU 46 | US 11.5 | US 13 | 27.9 cm |
| UK 11 | EU 46.5 | US 12 | US 13.5 | 28.4 cm |
| UK 11.5 | EU 47 | US 12.5 | US 14 | 28.8 cm |
| UK 12 | EU 47.5 | US 13 | US 14.5 | 29.2 cm |
| UK 12.5 | EU 48 | US 13.5 | US 15 | 29.6 cm |
| UK 13 | EU 49 | US 14 | US 15.5 | 30.1 cm |
Birkenstock
Birkenstock use EU sizing; the US value is a range.
| UK | EU | US | Foot length |
|---|---|---|---|
| UK 2.5 | EU 35 | US 2-2.5 | 21.2 cm |
| UK 3.5 | EU 36 | US 3-3.5 | 22.0 cm |
| UK 4.5 | EU 37 | US 4-4.5 | 22.9 cm |
| UK 5 | EU 38 | US 5-5.5 | 23.3 cm |
| UK 5.5 | EU 39 | US 6-6.5 | 23.7 cm |
| UK 7 | EU 40 | US 7-7.5 | 25.0 cm |
| UK 7.5 | EU 41 | US 8-8.5 | 25.4 cm |
| UK 8 | EU 42 | US 9-9.5 | 25.8 cm |
| UK 9 | EU 43 | US 10-10.5 | 26.7 cm |
| UK 9.5 | EU 44 | US 11-11.5 | 27.1 cm |
| UK 10.5 | EU 45 | US 12-12.5 | 27.9 cm |
| UK 11.5 | EU 46 | US 13-13.5 | 28.8 cm |
| UK 12 | EU 47 | US 14-14.5 | 29.2 cm |
| UK 13 | EU 48 | US 15-15.5 | 30.1 cm |
Crocs
Crocs use EU ranges and fit roomy.
| UK | EU | US | Foot length |
|---|---|---|---|
| UK 3 | EU 36-37 | US 4 | 21.6 cm |
| UK 4 | EU 37-38 | US 5 | 22.4 cm |
| UK 5 | EU 38-39 | US 6 | 23.3 cm |
| UK 6 | EU 39-40 | US 7 | 24.1 cm |
| UK 7 | EU 41-42 | US 8 | 25.0 cm |
| UK 8 | EU 42-43 | US 9 | 25.8 cm |
| UK 9 | EU 43-44 | US 10 | 26.7 cm |
| UK 10 | EU 45-46 | US 11 | 27.5 cm |
| UK 11 | EU 46-47 | US 12 | 28.4 cm |
| UK 12 | EU 48-49 | US 13 | 29.2 cm |
| UK 13 | EU 49-50 | US 14 | 30.1 cm |