Welcome ! 
<br />Our size is Asian size you need buy one size bigger than your real size.
<br />For example,If you wear US size 7,you need to choose US size 7.5 or 40,
<br />If your foot is large and wide,Please choose one more size again.
<br />39 EU----23.5cm(Foot Length)-----6 US size
<br />39 EU----24.1cm(Foot Length)-----6.5 US size
<br />40 EU----24.4cm(Foot Length)-----7 US size
<br />40-41 EU----24.8cm(Foot Length)-----7.5 US size
<br />41 EU----25.4cm(Foot Length)-----8 US size
<br />41-42 EU----25.7cm(Foot Length)-----8.5 US size
<br />42 EU----26.0cm(Foot Length)-----9 US size
<br />42-43 EU----26.7cm(Foot Length)-----9.5 US size
<br />43 EU----27.0cm(Foot Length)-----10 US Size+
<br />43-44 EU----27.3cm(Foot Length)-----10.5 US Size
<br />44 EU----27.9cm(Foot Length)-----11 US Size 
<br />There may be a little color difference due to the different monitor！please understand.