eBay

11.5 x 9-inch plastic laminating sheet (200-pack)
Compatible with all leading thermal laminators
2.8 mil thick material provides reliable strength and clear transparency
Ideal for sealing and protecting documents, photos, recipes, and more
Simply place document into sheet and insert into laminator; cut to fit for custom sizes

Amazon Basics Clear Thermal Laminating Plastic Paper Laminator Sheets - 9 Inch x 11.5 Inch, 200-Pack

Amazon Basics