The ideal way to protect important papers, favorite pictures and more. No heat or special equipment necessary. A plastic outer layer is permanently placed over a document making it much sturdier and protecting it from moisture and damage. Do-it-yourself laminating film can be cut to any size—easy split-back liner with grid pattern makes trimming easy. Length: 12″; Width: 9″; Thickness/Gauge: 3 mil; Laminator Supply Type: Sheet.