Double B Hat: Measured 46cm Branshes Cap: 44-46cm The back of the head has a rubber design, so it stretches a bit. Bear Ear Hat: 46cm My child hates hats, so they only tried them on and outgrew them. The material is like summer knit, so it's smooth and can be used in seasons other than fall and winter. Perfect for outings, playing in the park, and other times when sweat and dirt are common. How about having some spares? Those who want to buy separately, please consult via comments☆