Thank you for looking! The size isn't listed, but this is a hat for toddlers. I measured the circumference inside, and it's 57cm. The string is adjustable. I think it's suitable for toddlers to kindergarteners. It folds up compactly. The condition is good, but it's a used item, so please refrain from purchasing if you are sensitive to this. We offer discounts on children's clothing when you buy multiple items, so please take a look at my other items (*^^*) Please read my profile before purchasing.