This is by far the best elf shoe for this price. I am a pro elf and clown & have bought 15 dif. elf shoe brands. This is big enough for a womens size 9 slender tennis shoe, sandal, even ankle boot to fit inside for long hours of comfortable work. It may be possible for a man 10-11 to slip a flip flop inside. I'm buying them for all my elf workers! Warm also. These should last 2-3 years for us.