In a tennis shoe I typically wear a normal width- in heels or flats a wide width is preferable but rarely attainable. Ordered a 13 and it still fit him well but another croc i bought was a size 13 and it has a lot of space in the back but these crocs have only a little space in the back They stick well and I have not had one fall down yet. MY FOOT IS ABOUT 10 INCHES FROM HEEL TO TOE. FINALLY a pair of house slippers that do not wear out quickly. But for now, it’s fine. They are an affordable alternative. With a little help from my 12 year old daughter we had these installed in 20 minutes That’s literally the only problem plaguing these headphones. It comes with a little holder to hold the different sizes of grips to hold all different sizes of brushes.