| Lusso Size |
US Men's |
US Women's |
UK |
EU |
JP (cm) |
| 3M / 5W |
3 |
5 |
2 |
34.5 |
21 |
| 4M / 6W |
4 |
6 |
3 |
36.5 |
22 |
| 5M / 7W |
5 |
7 |
4 |
37.5 |
23.5 |
| 6M / 8W |
6 |
8 |
5 |
39 |
24.5 |
| 7M / 9W |
7 |
9 |
6 |
40 |
25.25 |
| 8M / 10W |
8 |
10 |
7 |
41.5 |
26 |
| 9M / 11W |
9 |
11 |
8 |
42.5 |
27 |
| 10M |
10 |
– |
9 |
44 |
28 |
| 11M |
11 |
– |
10 |
45 |
28.5 |
| 12M |
12 |
– |
11 |
46.5 |
29.5 |
| 13M |
13 |
– |
12 |
47 |
30 |
| 14M |
14 |
– |
13 |
48 |
31 |
| 15M |
15 |
– |
14 |
49 |
32 |
|
