Includes 12 dozen magnetic rollers: 8 dozen long 4 dozen short 6 assorted colors and diameters Short rollers: 37mm length, 8 sets composed of one of each, red, green, beige, yellow, orange, blue (total 48) Long rollers: 67mm length, 16 sets composed of one of each, red, green, beige, yellow, orange, blue (total 96) Rollers are vented Dimensions of base holder: 30 x 20 cm