This is a Hangyodon mat. I won it in a UFO catcher game. It wasn't in a bag, and I won it folded, rolled up, and tied with a string, so it had creases from the beginning. After winning it, I stored it in a chest of drawers and never used it. I've included a picture at the end showing the approximate size, measured with a mobile phone measurement app. I will fold and roll it up to make it as small as possible for shipping. Sanrio Hangyodon