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 />For Example， you wear size US size 7， this shoes you need to choose US size 7.5. Because this shoes is smaller one size. Large wide foot choose one more size again.<br /><br />Material:Lycra Fabric， Net， Rubber<br />Color: Blue， Black， Light Gray ，Dark Grey