MEASUREMENTS THE NIKKI
The Nikki has a normal fit, but if you are in between sizes go with the bigger one, Fits most feet, narrow to normal and slightly wider.
The Nikki
36 = 22,8 cm
37 = 23,5 cm
38 = 24,2 cm
39 = 24,8 cm
40 = 25,5 cm
41 = 26,2 cm
42 = 26,8 cm