Imported from Japan and the Tokyo Ryogoku Kokugikan (Tokyo Sumo Arena).
These keychains have a caricature figure of a wrestler wearing a red or blue mawashi which is made to look like the wrestler is dangling from your keychain. The Blue wrestler is a side view while the Red wrestler looks straight out at you. Very cute images as created by the late, former wrestler Kototsurugi.
The wrestler is made of rubber with the wrestler colored on one side. It is about 7 cm (2.75") not including the chain length.