Thank you for viewing. This is a baby hat from Familiar. Size: 45-47 This hat is designed for babies and won't get in the way while they're sleeping. The brim has no stiff core and is soft, so it can be folded compactly. The back is elastic and soft, allowing for a comfortable fit. It seems like it can be used year-round, except in the dead of winter. Please understand that this is a used item, inspected by an amateur, stored at home, and used by a child.