Sanrio HELLO KITTY Calculator This is a Hello Kitty calculator. The front is made of vinyl material and the back is made of cloth material. It's very thin, about the size of a notebook. (Uses button batteries) Both Hello Kitty and the pink color are lovely and cute ♡ Since it's unused, I haven't pulled the tab to turn the main unit ON, but since several years have passed since I purchased it, I don't know if it works. I would like to prioritize those who are purchasing it as a collection piece or a junk item. In some cases, I may pull the ON tab near the battery here and actually check if it works, and then relist it. Therefore, if you are considering purchasing it, please send me a message beforehand indicating whether you: "Wish to purchase it as an unused collection piece or junk item, even if it may not work," or "Wish to purchase it as a working item, so you would like me to check if it works before purchasing." There was no box from the beginning, so I will ship it with cardboard reinforcement and waterproof packaging. The size is approximately (measured by an amateur): Length: about 20cm Width: about 15cm.