I don't understand Mahjong at all, but I'm selling this because a friend left it behind. It's very clean. I'm also including the mat, but I don't know its condition. If you don't need the box, I'll fold it up for shipping. Only for someone who will take the whole set! I don't use it... ! According to my research, it seems to be a Mahjong set recommended by the Japan Professional Mahjong Association. ↓ I asked AI Tile size: Approximately 26.5mm x 20.5mm x 16mm Weight: Approximately 13.9g per tile Material: Urea resin Accessories: Score sticks, dice, East wind indicator, Yakitori marker, chips, guide book