High impact polystyrene sheet thicknesses– 0.020 in, 0.030 in, 0.040 in, 0.060 in, 0.080 in, 0.100 in, 0.125 in, 0.187 in, 0.250 in, 8 mm, 10 mm, 12 mm, 15 mm High impact polystyrene sheet sizes – 12 in x 12 in, 16 in x 16 in, 18 in x 18 in, 20 in x 20 in, 21 in x 51 in, 24 in x 24 in, 24 in x 48 in, 32 in x 48 in, 36 in x 36 in, 40 in x 72