This is a half-bone koma (bridge) used for Tsugaru-jamisen. Height: 2 bu 6 rin, Width: 2 bu, with string grooves. *Compared to a koma of the same size, they were identical, so I believe this is the correct size. Used a few times. I think it's in relatively good condition. I have several of the same size, so I'm listing them. Please check the images and understand that this item is non-refundable and non-returnable.