Birthday Nishimatsuya Newborn Hat Since this is for a baby, there is no inner tag and the head circumference is not written. Therefore, I cannot specify the exact size, but I think it's a size for around 0 to 3 months old. I put it on my baby around 3 months old, and it fit just barely. Used twice. It's in good condition because it hasn't been used much. It's made of terry cloth, so it's a gentle material. How about it for going out, such as for walks or checkups? The bear ears were very cute!