I bought a size 5 for my three-year-old and a size 8 for my six-year-old because they love pajama with feet but it is hard I find them in larger sizes. They are very soft and wash well without any piling like some of the off brands. My only complaint is my three-year-old has a large foot and I cant even get his foot into the size 5 pajamas but a size 6 would be too big for him.