First，you need to measure your foot length ，next，please according to your foot length to choose shoe size.<br />EUR 35= Foot Length 22.5cm=US Size 5.0.;<br />EUR 36= Foot Length 23.0cm=US Size 5.5.;<br />EUR 37= Foot Length 23.5cm=US Size 6.0;<br />EUR 38= Foot Length 24.0cm=US Size 6.5;<br />EUR 39= Foot Length 24.5cm=US Size 7.0; <br />EUR 40= Foot Length 25.0cm=US Size 7.5; <br />EUR 41= Foot Length 25.5cm=US Size 8.0; <br />EUR 42= Foot Length 26.0cm=US Size 8.5; <br />EUR 43= Foot Length 26.5cm=US Size 9.0;<br />EUR 44= Foot Length 27.0cm=US Size 9.5; <br />EUR 45= Foot Length 27.5cm=US Size 10.0; <br />EUR 46= Foot Length 28.0cm=US Size 10.5; <br />EUR 47= Foot Length 28.5cm=US Size 11.0; <br /><br />(1 cm = 0.39 inch，1 inch= 2.54 cm )