PERFECT SIZE FOR PACKAGING: Truly size of 13" x 15", 15" length excludes glue flap. Larger than 11x14 inches. Acid-Free & Durable: Made of 100% new Polypropylene material, which is archival safe, acid free. Comprehensive Protection: Easy to store your photos, document, paper or other important items with these bags. Crystal Clear: Transparent bags, display and clearly showing the charm of artwork. Multi-purpose - These clear plastic bags are designed to comfortably fit picture mats, posters, cards, documents, papers and many other important articles. Protect the appearance of your articles from damage. 1, How to choose suits own bags? for example: 8.5"x11" prints :8.5 inches x 11 inches(WxL) choose bag width = 9 inches bag length = 11 3/7 inches 2, What are the factors to choose the size of bags? The size, thickness, and the number of items in each package are factors to be considered. 3, How thick can this bag hold? It depends on the length and weight of the item. If it's a small item, it can be thicker, but if it's almost as big as the size of the bag, try not to be too thick. Warm reminder Please choose your bag size carefully!(The right size will save you time, cost, and labor.) It is recommended to choose a slightly larger package size!This will be more flexible and easy to package!