These pockets seal at end and remove easily from desk. Self-adhesive and heavy duty. Open pocket, slip in document, remove backing, position pocket and stick! Great for documents, artwork, large photos, and signs. Pocket fits 9″ x 12″ document. Each pocket measures 9″ tall by 12″ wide. Each pack includes 12 pockets. Sold as 3 packs for a total of 36 pockets. Heavy-Duty, Self-Adhesive Sheet Protector Transparent/Clear 9″ x 12″ Top Loading 12 Per Pack, 3 Packs (36 Total Sheets) Great for Documents, Artwork, Large Photos, and Signs Specifications table Attribute name Attribute value color & material Color Family The PRIMARY material that the item is made of. Plastic True Color Acid content determines how long the paper or product will last before breaking down. The acid level is measured by the pH (potential of hydrogen) on a scale from 0 to 14. Acid Free (alkaline) paper has a higher pH (above 7), has a longer life expectancy, and is less likely to discolor and break down over time. Non Acid Free Anti-Glare 0 Sheet Protector Durability Clear Water Resistant Top Loading Sheet Protector Type 12 Sheet Protector Pack Size 12