This item was purchased at a shop inside Universal Studios Japan (USJ) around the spring of 2024. It was attached to a backpack about 1 or 2 times after purchase. The size is 11cm for the main body, and 21cm with the chain attached (see photos 3 and 4). As it's from 2024, it's likely not sold much anymore. It's in relatively good condition as it hasn't been used much, but please note that there may be some minor fraying.