Thank you for finding it! This item uses a 3.8cm walnut button. It comes with a 5cm diameter hair tie, and the back is felted. I embroidered my favorite Maskman and made it into a hair tie. Wear this, get pumped up, and let's go watch some pro wrestling! How about it? [Discounts for multiple purchases!] If you would like to purchase multiple items, please check my profile. For an additional 50 yen, I can change the shipping method to Yu-Yu Mercari delivery, so if you would like this, please let me know in the comments before purchasing. #HairTie #Embroidery #WalnutButton #Maskman #ProWrestling