I bought this dress for both my daughter and niece and based on other reviews it fits both as expected. Both girls are tall and thin, one is almost 3 years old and the other is almost 4 years old. 3-4T are suitable for the little ones and 4-5T for the bigger ones. It's not machine washable, it's very wrinkled and I don't know how to get the creases out of the tulle. It was ordered with another dress and the second dress was won for the event so the girls use it for outfits. It's shiny all over, but it's a beautiful dress.