This size guide is exclusive to Belenka's Claire and Iris sandal models.

Type of last for Medium to Wide feet.

Size	Broad	Sole length
36	9	23.7
37	9.3	24.4
38	9.4	25
39	10	25.6
40	10.2	26.4
41	10.4	27
42	10.6	27.5
43	10.8	28.5