ClearBags 16x20 Seal Top Closure Bags, For 16x20 Photos - Resealable Adhesive on Bag - Crystal Clear Acid Free Archival Safe - RPA16x20 Pack of 25 Protect: Perfect for display, archiving, and handling, these will protect from wear, fingerprints, and dust, while allowing your piece to shine. #1 choice of professional artists and photographers. Dimensions: 16 7/16x20 1/8, perfect for standard 16x20 contents. Ideal for art and photos with double mats with backing, or single mats with foam board up to about 5/16 thick. Resealable adhesive is on the body of the bag, not the flap, so it wont come into contact with bag contents. The adhesive is static free and is great for products that require frequent removal. High quality thickness and clarity: ClearBags crystal clear, 1.6 mil polypropylene plastic bags provide optimum protection. These bags are acid free, lignin free, USPS approved, and eco-friendly. The Clearbags guarantee: At ClearBags, we have made it our lifes work to help you promote, protect and preserve your products. You will love these Clear Seal Top Bags or your money back.