best laminating - 3 mil clear letter size thermal laminating pouches - 9 x 11.5 (100 pouches) best laminating® resists extreme temperatures, liquid penetration and rough handling. bonds well to card stock, inkjet and other porous papers with light to medium ink coverage. stock up and save! length: 11 1/2"; width: 9"; thickness/gauge: 3 mil; laminator supply type: letter.