First，you need to measure your foot length ，next，please according to your foot length to choose shoe size.<br />EUR 39= Foot Length 24.5cm<br />EUR 40= Foot Length 25.0cm<br />EUR 41= Foot Length 25.5cm<br />EUR 42= Foot Length 26.0cm<br />EUR 43= Foot Length 26.5cm<br />EUR 44= Foot Length 27.0cm<br />EUR 45= Foot Length 27.5cm<br />EUR 46= Foot Length 28.0cm