Our sizes are built on the VIBRAM sole and it is a regular size fit. 

Europe size 36 / USA 5 / UK 4

Europe size 38 / USA 6.5 / UK 5.5

Europe size 39 / USA 7 / UK 6

Europe size 40 / USA 8 / UK 7

Europe size 41 / USA 8.5 / UK 7.5

Europe size 42 / USA 9.5 / UK 8.5

Europe size 43 / USA 10.5 / UK 9.5

Europe size 44 / USA 11 / UK 10

Europe size 45 / USA 12 / UK 11

Europe size 46 / USA 12.5 / UK 11.5