I think this can be used for children aged 2 to 4 years old. The hat is included, which is great for sun protection. The ruffles on the bottom were very cute. I'm selling it because my child has outgrown it. Black and red polka dot swimsuit set with ruffles (reversible hat included), size 3T, perfect for UV protection. - Color: Black and red polka dots - Size: 3T - Material: 80% nylon, 20% spandex - Design: Bikini with ruffles and a hat set Thank you for looking.