I usually take a size 8 1/2 - 9 shoe and these were the only slippers I found which came in that size. Still, I paid like $15. WH-1000XM4????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? Also, these easily fit my size 13 and 12 feet. Astro makes such good quality products but with these the sound being subpar at best and the build quality as poor as can possibly be, I would recommend you bypass this headset. Wore these on a family cruise. However, I put it in the wall and it so sturdy that it can hang very well, I like it since it is small and fit in a narrow space. I have larger calves and these boots are perfect and have enough room. The XB33 has every bit the volume and bass youd want, its shockingly loud for its size, lightweight, portable and it floats on water--huge bonus. Lazy river, rides, wave pool, etc.