We suggest if you want make a correct choice you should choose by size chart in the images

men size chart:

EU 38 ( US 6.0, AU 6.0 , UK 5.0 ) (foot length:240mm)
EU 39 ( US 6.5, AU 6.5 , UK 5.5) (foot length:245mm)
EU 40 ( US 7.0, AU 7.0 , UK 6.0 ) (foot length:250mm)
EU 41 ( US 8.0, AU 8.0, UK 7.0 ) (foot length:255mm)
EU 42 ( US 8.5, AU 8.5 , UK 7.5 ) (foot length:260mm)
EU 43 ( US 9.5, AU 9.5 , UK 8.5) (foot length:265mm)
EU 44 ( US 10.0, AU 10 , UK 9.0) (foot length:270mm)
EU 45 ( US 11.0, AU 11 , UK 10.0) (foot length:275mm)
EU 46 ( US 12.0, AU 11 , UK 11.0) (foot length:280mm)
EU 47 ( US 13.0, AU 12 , UK 12.0) (foot length:285mm)