Alohas Ibizas Platform camel size 37

These have been worn a handful of times and are overall are in good shape. The strap on the right foot is not as sturdy as the left foot and I had an issue with it falling off of my heel while walking. I assume there is some sort of hack to make it stay up? According to the box, a size 37 European is 6.5 U.S.. I wear a 7.5 usually and I feel I could have gone up a half size, please refer to sizing measurements on the website!