ClearBags Crystal Clear Bags help you promote, protect, and preserve your paper crafts, photos, documents, artwork, collectibles, stationary, and crafts. Made from Biaxially Oriented Polypropylene (BOPP) for exceptional clarity with static-free, re-sealable adhesive strip closures. Durable 1.6 mil and are US Postal approved with additional postage required. 4.25"x 5.5" Stationery 25pc- Ensure your product looks great while it passes through the retail distribution channel. Archival quality and the ultimate in stationery storage protection. Bag size 4 5/8"x 5.75".