I fell in love with this hat at a hat shop and bought it. It's so cute that I didn't want to wear it, and before I could, my daughter outgrew it, so I'm selling it new. The listed size is 54, but the brim is small, and the overall size feels small as well. I bought it when my daughter was 3 years old, and when I tried it on her at its smallest setting, it fit perfectly and looked adorable. I think the size adjustment allows it to be worn by a wide range of head sizes.