My daughter wears a 5 in most shoes, a 4. I had already bought screen protector and that the one on the case could offer supplemental protection, but it ended up coming apart after a few days. -Mandy ?? I wish these sandals work for me because they sure do look nice! 5 or 9 wide in regular shoes and I bought these in a size 9 and they are perfect. Comfortable. I?m attempting to break them in but in the mean time the excitement I had for replacing my previously retired slides with these have been neutralized. Its lighter and easier for my son to manipulate on his own. I believe for the majority of PC gamers, these will work just fine and the usb lighting requirement will not be a big deal. I wanted a couple of pairs of slippers that I could toss in the washing machine or throw away, and picked these.