sense of wonder Sense of Wonder 100% cotton reversible hat With chin strap, adjustable size This is a reversible hat in light blue and mint green. Made of very soft gauze material, it can be worn by babies with peace of mind. Size adjustment and chin strap are also convenient. I don't know the exact size because I cut off the tag, but it was perfect for use when the child was 0-1 years old. The head circumference is about 44-46cm, according to amateur measurements. The item has been used a lot by children, but it is still clean, so I am selling it. Please consider this item, as it is a used item and has been stored at home. I am also selling other items. I will discount the shipping cost if you purchase multiple items, so please let me know.