US size equivalent is approximate.
Please according to below chart to choose your size!
EU/FR 34= Foot Length 220mm=US4.5
EU/FR 35= Foot Length 225mm=US5
EU/FR 36= Foot Length 230mm=US5.5
EU/FR 37= Foot Length 235mm=US6
EU/FR 38= Foot Length 240mm=US7
EU/FR 39= Foot Length 250mm=US8
EU/FR 40= Foot Length 255mm=US9
EU/FR 41= Foot Length 260mm=US10
EU/FR 42= Foot Length 260mm=US11
EU/FR 43= Foot Length 260mm=US12
If you wear 37 size sport shoes at ordinary times, you can choose this shoes 37 size.If your foot breadth is wider than normal,Please choose one size larger.Just for reference,please choose the right size according to your real foot length.