This is an approximate size conversion guide:

Men’s Size Conversions

Euro SizesUK SizesUS SizesInches
385.569.25″
3966.59.5″
406.579.625″
40-4177.59.75″
41789.9375″
41-427.58.510.125″
428910.25″
42-438.59.510.4375″
4391010.5625″
43-449.510.510.75″
44101110.9375″
44-4510.511.511.125″
45111211.25″
46121311.5625″
4712.51411.875″
4813.51512.1875″
49141612.5″