Heat Activated Laminating Pouches Vertical Half Letter 5 Mil x 2 Sides, 4-3/4 x 11-1/2 (121mm x 292mm x 125um x 2 Sides) [pk of 500] for up Through 4-1/2 x 11-1/4 Sheets, Clear Gloss

Pack of 500 thermal heat-activated laminating pouches sealed on a single edge, includes 5 reusable silicone-coated laminating carriers for laminators that require them.
Two durable 5 mil polyester plastic sides contain heat-activated adhesive (10 mil total to encapsulate your sheet), which turns clear when heat and uniform pressure are applied (a laminator is recommended).
Recommended Insert Sheet Dimensions: Maximum 4-1/2 x 11-1/4 (114mm x 286mm) provides a 1/8 (3mm) sealed edge border to protect your sheet.
Features small pre-rounded corners for a safe, professional finish, with an approximate 1/8 radius (3mm).
Metric pouch dimensions: 121mm x 292mm x 125 microns thick (x 2 sides = 250 microns total thickness added to your sheet)