Clamshell Breakaway Tart Cubes have 6 cubes per container. Each Tart Cube is approx. 3-3.5 ounces of wax. Just pop tarts out of the molds and break a cube and place into your wax warmer. Colors Vary, Tart Cubes often come white or with no color, specks of color can show on the bottom of some cubes.