Japanese Size	US Size
21	4
21.5	4.5
22	5
22.5	5.5
23	6
23.5	6.5
24	7
24.5	7.5
25	8
25.5	8.5
26	9
26.5	9.5
27	10
27.5	10.5
28	11
28.5	11.5
29	12

The conversions featured in this size chart are approximate.
If you are already familiar with the designer's fit, order the size you normally wear.