Sheets may ntain rough edges or smooth skin. Polyethylene Thickness Sheets thicker than 1/2" are made from 1/2" sheets laminated together. 2" Polyethylene may range in thickness from 2" to 2-1/4". HDPEpping 2" Polyethylene 2" x 48" x 108" and 2" x 24" x 108" sheets will be cut down to 54" x 24" sheets for HDPEpping purposes.