This is a set of five wooden masu (sake cups) made from natural Yakusugi cedar. Approval number: SK-KS-1001 Size: Approximately 56 x 56 x 33mm (outer dimensions) 38 x 38 x 26mm (inner dimensions) Although unused, it is quite old. This was received as a souvenir. Please refrain from purchasing if you are overly concerned about condition.