This is a presumably old Mashiko-ware teacup. One cup has noticeable iron spots (iron from the clay or glaze that surfaced during firing) on the inside. - Quantity: Set of 4 - Color: Gray and white stripes - Material: Ceramic - Shape: Teacup - Features: Handmade texture Thank you for looking. Diameter: Approximately 10.0cm Height: Approximately 6.2cm There are individual differences.