Wear the type of socks you'll wear with your shoes and measure feet in the afternoon (feet typically swell during the day). Distribute weight evenly before measuring.

STEP 1

Stand up straight on a hard surface with your heel against the wall and a piece of blank paper taped to the floor, flush against the wall beneath your foot.

STEP 2

Have someone mark the longest part of your foot (referred to as heel-to-toe length) on the paper with a pen or pencil, or measure yourself if necessary. Repeat with the other foot, as right and left sizes may be different.

STEP 3

Use a ruler to measure the heel-to-toe length you marked for each foot.

Nike Footwear Sizing Men's Top

HEEL–TO–TOE LENGTH (cm) EU SIZE UK SIZE US SIZE
23.7 38.5 5.5 6
24.1 39 6 6.5
24.5 40 6 7
25 40.5 6.5 7.5
25.4 41 7 8
25.8 42 7.5 8.5
26.2 42.5 8 9
26.7 43 8.5 9.5
27.1 44 9 10
27.5 44.5 9.5 10.5
27.9 45 10 11
28.3 45.5 10.5 11.5
28.8 46 11 12
29.2 47 11.5 12.5
29.6 47.5 12 13
30 48 12.5 13.5
30.5 48.5 13 14
31.3 49.5 14 15
32.2 50.5 15 16
33 51.5 16 17
33.9 52.5 17 18

Nike Footwear Sizing Women's Top

YOUR HEEL-TO-TOE LENGTH (cm) EU SIZE UK SIZE US SIZE
22 35.5 2.5 5
22.4 36 3 5.5
22.9 36.5 3.5 6
23.3 37.5 4 6.5
23.7 38 4.5 7
24.1 38.5 5 7.5
24.5 39 5.5 8
25 40 6 8.5
25.4 40.5 6.5 9
25.8 41 7 9.5
26.2 42 7.5 10
26.7 42.5 8 10.5
27.1 43 8.5 11
27.5 44 9 11.5
27.9 44.5 9.5 12