These are incredibly cool mahjong tiles featuring a design of "a soaring bird" for the "I-Sou" (one of the bamboo suits). The tile size is 25.5 x 18.5 x 15.5 mm. These are old mahjong tiles, but there are no noticeable scratches on them (no cracks or breaks at all). Although they are several decades old, I believe these mahjong tiles are in beautiful condition. The backs of the tiles are also in a beautiful state as shown in the photos, and the overall condition is considered to be quite good. The "bamboo pattern design" of the Souzu (bamboo suit) and the "soaring bird of I-Sou" are simply awesome. Mahjong tiles with this design and black backs are rarely seen in circulation, making them quite rare.