Available in two sizes: M (4-6 years old) = head circumference 52-54cm. Soft, breathable, and comfortable to wear. The inner sweatband is highly breathable, providing a comfortable feel! It has a windproof chin strap, so it won't blow away even in the wind! Great for outdoor activities such as going to kindergarten/school, cherry blossom viewing, playing at the beach, picnics, hiking, and travel, and is recommended for the upcoming season! Of course, it's brand new and unused. Instant purchase is welcome. I will handle the transaction smoothly. ^_^