Size 8-10.5 is US size， size 41-46 is EUR size.<br />US 7=EUR 39=245 mm， US 7.5 =EUR 40=250 mm， US 8=EUR 41=255 mm， <br />US 8.5=EUR 42=260 mm， US 9=EUR 43=265 mm， US 9.5=EUR 44=270 mm， <br />US 10=EUR 45=275 mm， US 10.5=EUR 46=280 mm<br />  Please choose the right color， we send you the color according to the color option(Color Word). The main image/first picture is White， so you need to choose the color word-White !!!<br />Smaller one size， please choose one larger size.<br />For example， you wear 40 size， you need to choose 41 size.