The adult/youth Fuzzy Friends slippers by Aroma Home measure ten inches inside the shoe. In other words, measure foot before purchasing. Slippers fit most youth size 3-6 and women's size 5-9.5. These will not fit anything over a men's 7 or a women's 9.5. To ensure your satisfaction, please double check shoe size to ensure feet will fit nicely into the 10” interior of the Fuzzy Friends slippers.