I just got my mickey crocs from shoe buy and I have quick question: I got the MEDIUM (w 8-9) because my regular cayman croc is a 9. These are tighter than the caymans though. The top touches my foot fully, and it is tighter all around the foot. It fits like I would probably wear a normal shoe. My question is, I know that crocs are supposed to be worn loose, which is how I wear my caymans which I love. Should I return these to shoebuy for a larger size or do these just fit differently? Any experiences? Also, what is shoe buy's returns like? I leave in 9 days and want my mickey crocs for the trip, will I be able to do it in time? TIA!