These pockets seal at end and remove easily from desk. Self-adhesive and heavy duty. Open pocket, slip in picture/card, remove backing, position pocket and stick! Each pocket measures 4.5″ tall by 7″ wide. Each pack includes 25 pockets. Sold as 5 packs for a total of 125 pockets. Heavy-Duty, Self-Adhesive Photo/Index Card Protector Transparent/Clear 4″ x 6″ Top Loading 25 Per Pack, 5 Packs (125 Total Sheets) Great for Documents, Artwork, Large Photos, and Signs Specifications table Attribute name Attribute value color & material True Color The PRIMARY material that the item is made of. Plastic Color Family Clear Anti-Glare Heavyweight Water Resistant 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 Number of Holes Punched Sheet Protector Loading Style 25 Sheet Protector Pack Size 20 to 29