Size 7-9.5 is US size， size 39-44 is EUR size.<br />US 7=EUR 39=245mm， US 7.5 =EUR 40=250mm， US 8=EUR 41=255mm， <br />US 8.5=EUR 42=260mm， US 9=EUR 43=265mm， US 9.5=EUR 44=270mm， <br />US 10=EUR 45=275mm， US 10.5=EUR 46=280mm， US 11=EUR 47=285mm，<br />US 11.5=EUR 48=285mm<br />This is standard size of leather shoes， less one size than sport shoes. If you wear 40 size sport shoes at ordinary times，you can choose 39 size.Just for reference，please choose the right size according to your real situation!!!<br /><br />Outer Material: Leather<br />inner Material: Imitation Leather