Manufacturer recommended age is 4-10 years, but seeing & holding the actual slippers makes me think they're more like for 10-year-olds. I bought them as a gift for a 5 yo, and I so regretted buying them. Not only were the slippers way too big, the material is also too soft & thin to be worn on non-carpeted surfaces. The little girl I bought them for held the slippers in her hands, look at them for a minute, and never touched them again. What an abosultely disappointing product. They shouldn't even be sold at all!