Key Card Laminating Pouches are 2 1/2" x 3 7/8" and come in 5, 7 or 10 mil thickness. The thicker the laminating pouch the more rigid the result. A 5 mil credit card pouch will be fairly flexible, a 7 mil credit card pouch will be more rigid with some flexibility and a 10 mil credit card pouch will be quite rigid.