Stack Up rocks glass; 7 oz capacity; 3 1/8 in (H) x 2 3/8 in (Base Diameter) x 3 1/4 in (Max Diameter); Fully tempered glass offers 5 times increased strength to decrease breakage and breaks into small pebbles; Stackable design and functionality; Equivalent to Libbey 15709; Part of Arcoroc product line; Sold by case of 1 dozen