Sizing Charts

NIKE                  
WOMEN'S US  MEN'S US UK EU CM
6W 4.5M 3.5 36.5 23
6.5W 5M 4 37.5 23.5
7W 5.5M 4.5 38 24
7.5W 6M 5 38.5 24
8W 6.5M 5.5 39 24.5
8.5W 7M 6 40 25
9W 7.5M 6.5 40.5 25.5
9.5W 8M 7 41 26
10W 8.5M 7.5 42 26.5
10.5W 9M 8 42.5 27
11W 9.5M 8.5 43 27.5
11.5W 10M 9 44 28
12W 10.5M 9.5 44.5 28.5
13W 11M 10 45 29
13.5W 11.5M 10.5 45.5 29.5
14W 12M 11 46 30
14.5W 12.5M 11.5 46.5 30.5
15W 13M 12 47 31
 
NIKE YOUTH  
 YOUTH WOMENS US UK EU CM
4Y 5.5W 3.5 36 22
4.5Y 6W 4 36.5 22.5
5Y 6.5W 4.5 37.5 23.5
5.5Y  7W 5 38 24
6Y 7.5W 5.5 38.5 24
6.5Y 8W 6 39 24.5
7Y 8.5W 6 40 25

ADIDAS - YEEZY SLIDES
MEN'S US WOMEN'S US UK EU CM
7M 8W 6.5 40 24.6
8M 9W 7.5 41 1/3 25.5
9M 10W 8.5 42 2/3 26.3
10M 11W 9.5 44 27.1
11M 12W 10.5 45 1/3 28
12M 13W 11.5 46 2/3 28.8
13M 14W 12.5 48 29.7

SOCKS 
Nike socks run a little small, if you're in-between sizes or unsure, it's best to size up!
SIZE WOMEN'S US MEN'S US UK EU
M 6-10 6-8 5-8 38-42
L 10-13 8-12 8-11 42-46