Size info: US6=UK3.5=EUR36=230mm (foot Length) US6.5=UK4=EUR37=235mm (foot Length) US7.5=UK5=EUR38=240mm (foot Length) US8.5=UK6=EUR39=245mm (foot Length) US9=UK6.5=EUR40=250mm (foot Length) Tips: Please pay much attention to the difference of the size to choose the most suitable and comfortable shoes.Due to diffent methods of measure,the error is allowed normally in 0.5cm-1cm.If your feet are fat or wide, pls get one bigger size for this shoes.