This was my second attempt at getting a new pair of Crocs that fit. My shoe size is W6.5 so I bought the size W6 Crocs. When they arrived and I tried them on, they were too small. My toes were scrunched together and walking just a few steps was not comfortable at all. I returned them and ordered the next size up (W7), but they were still too small. I compared them next to the pair I currently have (size W6-7/S/M4-5, bought from a shop in Mexico) and you can immediately see the size difference (see attached photo). Haven't decided yet whether to go up the next 2 sizes or just go up 1 size at a time. I am able to return them for a full refund, so that's good. But seeing how much smaller they are, I might jump up to size 9 even though my shoe size has never been that big. If those fit me well, then I will change my rating to 5 stars, as I love my Crocs and wanted to replace them with ones I could wear outside (wore a hole through them that they are now inside shoes/slippers).