Essential hat for mountain climbing. The length of the chin strap can be adjusted, so it won't come off even in the wind. The head circumference size can be adjusted at the back of the head. There is no tag, but the size is probably around the general 58cm. Easy to match with any outfit. Convenient to fold and carry. Since it is a used item, please understand. I will fold it and ship it. For those who want anonymous shipping, it will be ¥150 extra, so please comment.