In our case we had to take a punt on the size as its description did not seem to be compatible with what was indicated for the style she wanted, the heel height and with the ones she already had. They were also too narrow for me to get my toes in there comfortably. Great little air pod cover. These are my new favorite sandals ??Got these on sale for $109 so it was the deal of the year original cost is $150+. I still recommend this product. My 2yo son has wide feet, and most shoes are way too restrictive for him. Overall I did like the headphones. I honestly would have left a 3-star review to be nice because I really wanted them to work & maybe I was just one customer they didnt work for. Needed new pads for my QC35 ii but these are nothing like the originals.