Poly Zip Seal bags measure 6" x 9" with the zip along the 6" end. Even though the bag is designed to store documents up to 5.25 x 8.25, it will fit many small sized items. This 6x9" Poly Zip Seal Pouch 2 mil Clear is water resistant and completely inert. Size is 6x9", zips along the 6" end. You can put our 5x8 buffered paper envelopes inside of these bags, and most of our preservation kits include such zip bags for this purpose. It's a popular starting point for gathering time capsule items - just place similar items or items from each group into its own bag. At home, it's handy when you need to store lots of letter sized documents and receipts together. Any collector, museum, library, or archives will find hundreds of ways to use these Clear Polyethylene Zipper Bags.