Purchased from Raiyo Kiln (I believe the reading is Raiyo) in Yingge, Taiwan, a town known for its pottery. The shop had an artistic and sophisticated atmosphere, appealing to connoisseurs, among the many pottery shops. Both pieces are a bluish-white color, smooth, and have crackling. The smaller one is somewhat thin, while the larger one is somewhat thick, and both fit comfortably in the hand. Both have black spots on the inside, which were present from the time of purchase. Sizes: (Small) Diameter 7.6cm, Height 4.3cm (Large) Diameter 8cm, Height 6cm (approx.) They are sized to be used not only as teacups but also as sake cups. The smaller one cost around 5,000 yen, and the larger one cost around 2,000 yen. Both have only been used once or twice and are in beautiful condition. I think both are beautiful pieces with a lovely texture.