I received this as a souvenir from overseas. I am selling it because I don't use it. 6cm x 1cm, with some margin of error. Please understand that this is a non-sale item/promotional item, and therefore cannot be authenticated, guaranteed, or repaired. Please purchase only if you understand that this is a novelty item and accept no claims and no returns (^-^) Please refrain from purchasing if you are concerned about minor details.