The thickness of an acrylic sheet will positively influence factors like impact resistance. For cast acrylic sheets, there’s a wide variety of thicknesses ranging from .06 inches to 4 inches thick. Specifically, these thicknesses are .06″, 1/8″, 3/16″, 3/8″, 1/4″, 1/2″, 1″, 1.25″, 1.5″, 2″, 2.5″, 3″, and 4″.