orange rigid polyethylene sheet 5mm application Plastic Sheet Materials Clears, lors, Hard, Thick Plastic sheets range in various thickness, sizes, and even shapes to suit the application. From 0.06 inch to 6 inches, with some custom sizes available, mmon thicknesses range from 0.25 in, 0.5 in, 0.75 in, and 1 inch up to 6 inches.