Under Armour Size & Fit Guide
Kids toddler 10 to youth 7 · Men’s US 7–16 · Sized by foot length
Find your Under Armour size with Under Armour’s official kids’ and men’s charts by foot length — or stop in for a Brannock fitting at our Kettering, Ohio store.
How it fits
Under Armour sizes from the true foot length, measured heel to toe in centimeters and then translated into its standard sizes.
Under Armour says: if your measurement is between chart numbers, size up. Trace the foot with your full weight on it, and measure later in the day.
Kids
| US | Foot length (cm) | Foot length (in) | EU | UK |
|---|---|---|---|---|
| 10 (little kid) | 16 | 6.30" | 27 | 9½ |
| 10½ (little kid) | 16.5 | 6.50" | 27.5 | 10 |
| 11 (little kid) | 17 | 6.69" | 28 | 10½ |
| 11½ (little kid) | 17.5 | 6.89" | 29 | 11 |
| 12 (little kid) | 18 | 7.09" | 29.5 | 11½ |
| 12½ (little kid) | 18.5 | 7.28" | 30 | 12 |
| 13 (little kid) | 19 | 7.48" | 31 | 12½ |
| 13½ (little kid) | 19.5 | 7.68" | 31.5 | 13 |
| 1 | 20 | 7.87" | 32 | 13½ |
| 1½ | 20.5 | 8.07" | 33 | 1 |
| 2 | 21 | 8.27" | 33.5 | 1½ |
| 2½ | 21.5 | 8.46" | 34 | 2 |
| 3 | 22 | 8.66" | 35 | 2½ |
| 3½ | 22.5 | 8.86" | 35.5 | 3 |
| 4 | 23 | 9.06" | 36 | 3½ |
| 4½ | 23.5 | 9.25" | 36.5 | 4 |
| 5 | 23.5 | 9.25" | 37.5 | 4½ |
| 5½ | 24 | 9.45" | 38 | 5 |
| 6 | 24 | 9.45" | 38.5 | 5½ |
| 6½ | 24.5 | 9.65" | 39 | 6 |
| 7 | 25 | 9.84" | 40 | 6 |
Sizes marked “little kid” are Under Armour’s K sizes (10K–13½K); 1–7 are youth sizes. Under Armour notes that, because of metric/imperial conversion, two US sizes sometimes share one UK or centimeter size. Centimeters are Under Armour’s; inches are converted.
Men
| US | Foot length (cm) | Foot length (in) | EU | UK |
|---|---|---|---|---|
| 7 | 25 | 9.84" | 40 | 6 |
| 7½ | 25.5 | 10.04" | 40.5 | 6½ |
| 8 | 26 | 10.24" | 41 | 7 |
| 8½ | 26.5 | 10.43" | 42 | 7½ |
| 9 | 27 | 10.63" | 42.5 | 8 |
| 9½ | 27.5 | 10.83" | 43 | 8½ |
| 10 | 28 | 11.02" | 44 | 9 |
| 10½ | 28.5 | 11.22" | 44.5 | 9½ |
| 11 | 29 | 11.42" | 45 | 10 |
| 11½ | 29.5 | 11.61" | 45.5 | 10½ |
| 12 | 30 | 11.81" | 46 | 11 |
| 12½ | 30.5 | 12.01" | 47 | 11½ |
| 13 | 31 | 12.20" | 47.5 | 12 |
| 13½ | 31.5 | 12.40" | 48 | 12½ |
| 14 | 32 | 12.60" | 48.5 | 13 |
| 14½ | 32.5 | 12.80" | 49 | 13½ |
| 15 | 33 | 12.99" | 49.5 | 14 |
| 15½ | 33.5 | 13.19" | 50 | 14½ |
| 16 | 34 | 13.39" | 50.5 | 15 |
Centimeters are Under Armour’s; inches are converted.
Growing room (kids)
How much room? About a thumb’s width at the toe — roughly ½ inch (1 to 1.5 cm) between the longest toe and the end of the shoe.
Thumb test: with your child standing, press the tip of your thumb down at the front of the shoe. You should be able to press down without hitting a toe.
Time for a bigger size if toes are pressed against the front, the shoe leaves deep marks or blisters, or your child says their feet hurt. Too big if their heel lifts out when walking, or they trip or drag their feet.
How to measure
- Stand on a sheet of paper, with your weight on that foot.
- Mark the back of your heel and the tip of your longest toe.
- Measure between the marks in inches or centimeters.
- Measure both feet and use the longer one.
- Measure later in the day, when feet are at their largest, wearing the socks you’ll wear with the shoes.
Need help? We measure every customer with a Brannock device at our Kettering store. Stop in for a fitting, or call us at 937.298.1801 and we’ll help you choose. Ready to shop? Shop all Under Armour →
Source: Under Armour size and fit guide (underarmour.com) · Last checked October 2026