Baby knit hat, acorn hat, acrylic yarn, washable, bicolor, yellow fluffy New, unused This is a yellow fluffy hat. This hat was carefully and lovingly hand-knitted by a mom who is good at knitting. There are slight variations, but the size is for a head circumference of 48-50 cm. When laid flat, it measures 24 cm. In my son's case, he was able to wear it from 7 months old and can still wear it at 2 years old. The 2nd and 3rd photos are of the hat being worn. The 2nd photo shows my son at 1 year old on the left and 7 months old on the right. The 3rd photo shows a child wearing it at 1.5 years old. (All sizes are the same.)