Swim cap with a pink and white striped design, cap style with extra room in the back. - Color: Pink and white stripes - Design: Cap style - Back design: Design with extra room in the back Although it says free size, I think it's suitable for small children (around 4-5 years old) with small heads. It stretches like a swim cap. Measured with a measuring tape, the head circumference was 49cm. Thank you for looking.