Amazon states that the 37/38 is a US size 7/8, but it is actually a size 6 (it says so on the flip flop itself). I ordered the 7/8 but had to return them because they were too small. I ordered what Amazon calls the 9/10 and they fit perfectly. ON the flip flops it says size 7/8. Someone needs to fix the sizing on the website...<br />Great, comfortable sandals though.