I went down a whole size to a 9 wide and they fit perfectly. I have had Bluedio headphones before and knew they were a good brand but its fairly surprising how good these sound at under $20. Buena calidad de material. My baby is 14 months old and wears a size 4c in shoes. Note: the covers dont completely cover the pads--there are holes for the speakers, afterall. The rail looks good when mounted and at the risk of sounding ridiculous, it was a shame to cover it up with a towel! Youre clear. I did! The battery drains even if its not being used. I buy a new paid of these every 6 months or do because the foam comes out at the ball of my feet.