Vaddia Size Guide:

Ladies Size Guide

UK Size	EU Size	US/Canada Size
2.5	35	4.5
3.5	36	5.5
4.5	37	6.5
5.5	38	7.5
6.5	39	8.5
7.5	40	9.5
8.5	41	10.5
9.5	42	11.5