HDPE Standard Sizes, Cut-to-Size, and Fabrication. HDPE sheet thicknesses– 0.031 in, 0.062 in, 0.093 in, 0.125 in, 0.187 in, 0.250 in, 0.354 in, 0.375 in, 0.450 in, 0.500 in, 0.625 in, 0.708 in, 0.750 in, 1 in, 1.250 in, 1.500 in, 1.750 in, 2 in, 2.250 in, 2.500 in, 2.750 in, 3 in, 3.500 in, 4 in