Circulation Size Laminating Pouches are 3 15/16 inches x 5 11/16 inches or 3 15/16 inches x 6 7/8 inches and come in 7 or 10 mil thickness. The thicker the laminating pouch the more rigid the result. A 7 mil pouch will be more rigid with some flexibility and a 10 mil pouch will be quite rigid.