yiodesigner Size Guide
Sneaker Size & Fit Guide
Find the right fit before you order. Sneaker sizing can vary between brands and individual models, so there is no single UK-to-US or UK-to-EU conversion that applies perfectly to every pair.
Start with the size shown on the individual product page. Use the conversion tables below as a general reference and check any model-specific fit notes before ordering.
01 — Measure
How to measure your feet
Measure both feet while standing, preferably later in the day. Use the measurement from your larger foot when comparing your size.
Position your foot
Place a sheet of paper on a flat floor and stand with your heel lightly against a wall.
Measure heel to toe
Mark the end of your longest toe and measure from the heel to that point.
Check both feet
Repeat on the other foot and use the larger measurement when choosing your size.
02 — Conversion
Men's & Unisex Sneaker Size Conversion
Use this table as a general UK sneaker sizing reference. Brand-specific sizing can differ, so these conversions should not be treated as exact for every sneaker.
| UK | Typical US Men's | Typical EU | Approx. Foot Length |
|---|---|---|---|
| 5 | 5.5 | 38 | 23.1 cm |
| 5.5 | 6 | 39 | 23.5 cm |
| 6 | 6.5 | 39 | 24.1 cm |
| 6.5 | 7 | 40 | 24.4 cm |
| 7 | 7.5 | 40–41 | 24.8 cm |
| 7.5 | 8 | 41 | 25.4 cm |
| 8 | 8.5 | 41–42 | 25.7 cm |
| 8.5 | 9 | 42 | 26.0 cm |
| 9 | 9.5 | 42–43 | 26.7 cm |
| 9.5 | 10 | 43 | 27.0 cm |
| 10 | 10.5 | 43–44 | 27.3 cm |
| 10.5 | 11 | 44 | 27.9 cm |
| 11 | 11.5 | 44–45 | 28.3 cm |
| 11.5 | 12 | 45 | 28.6 cm |
| 12 | 12.5 | 45–46 | 29.0 cm |
General conversion reference only. Always prioritise the sizing and fit information shown for the individual sneaker.
03 — Brand Fit
Why the same UK size can convert differently
Sneaker brands use different lasts, conversion systems and size labels. That means the same UK size can correspond to different US, EU or centimetre values depending on the brand.
One UK size. Different brand conversions.
Compare the UK 8 examples below to see why yiodesigner does not use a single universal UK-to-US conversion for every sneaker.
| Brand | UK | US Men's | EU | CM / Length shown by brand |
|---|---|---|---|---|
| Nike | 8 | 9 | 42.5 | CM/JP 27; foot ≈26.2 cm |
| adidas | 8 | 8.5 | 42 | heel-to-toe 25.9 cm |
| Saucony | 8 | 9 | 42.5 | JPN 27 cm |
| New Balance | 8 | 8.5 | 42 | 26.5 cm |
| Gucci | 8 | 8.5 | 42 | JP 27 cm |
04 — Fit
Fit advice before you order
Fit varies by model. Where a sneaker is known to fit narrow, roomy, small or large, you'll find specific sizing advice on the individual product page.
If your measurement falls between sizes, choosing the larger size is generally the safer option unless the product page gives different fit guidance.
CM, JP and foot-length measurements are not presented in exactly the same way by every brand. Always read the relevant brand or product sizing information before comparing centimetre values.
05 — Answers
Sneaker sizing questions
Are UK and US men's sneaker sizes always one size apart?
Should I use my UK, US or EU sneaker size?
What should I do if I am between two sneaker sizes?
Does the centimetre measurement mean the same thing for every brand?
Can I return sneakers if the size is not right?
Still unsure about your size?
Contact the yiodesigner customer service team before ordering and we'll help you choose the most suitable size using the product and brand information available.