Nike cleats tend to fit tighter than your standard athletic shoe. Your feet might fit better in a half size up from your usual size of training/running shoes.
Nike Unisex Shoe Sizing Chart
US
Women's
EUR
CM
5.0
6.5
37.5
23
5.5
7.0
38
23.5
6.0
7.5
38.5
24
6.5
8.0
39
24.5
7.0
8.5
40
25
7.5
9.0
40.5
25.5
8.0
9.5
41
26
8.5
10.0
42
26.5
9.0
10.5
42.5
27
9.5
11.0
43
27.5
10.0
11.5
44
28
10.5
12.0
44.5
28.5
11.0
12.5
45
29
11.5
13.0
45.5
29.5
12.0
13.5
46.5
30
12.5
14.0
47
30.5
13.0
14.5
47.5
31
13.5
15.0
48
31.5
14.0
15.5
48.5
32
This sizing chart is provided as a general guideline. Please contact customer service for additional sizing guidance.