Only tried on. In my child's case, they don't seem to like wearing hats, so I've kept it stored away carefully. Head circumference: 40-54cm (approx. 6 months to 5 years old) - This cushioned hat protects your baby from bumps! - Transforms into a cute bee when worn! - Protects the head from front, back, and sides! - Mesh lining for breathability - Head circumference can be adjusted with Velcro - Washable for cleanliness (hand wash recommended)