Crafted of Stoneware, featuring a reactive glaze. Due to the nature and hand-crafted qualities of reactive glaze, no two pieces are exactly alike and will exhibit unique variations in color and pattern. Product may slightly differ from image shown. Designed for enjoying the froth on your favorite latte, these graceful mugs are super for whatever beverage you prefer. Microwave and dishwasher safe. Set of 4 latte mugs, each measures 4-3/4 inch long x 3-1/2 wide x 5-1/4 inch high and holds 18 ounces.