Mylar Bags 1/2 Quart Ziplock Odor-Proof (6"x6") 5 Mil Aluminum Foil Long Term Storage of Food, Seeds, Organics, and Herb (50) SMALL MYLAR BAG - Outer Dimensions 6"x6" Half Quart Ziplock Bag. Inner Dimensions are 5.25"x5". NO LIGHT, NO MOISTURE, NO OXYGEN: 5 Mil Double-sided Silver Material Designed Specifically For Long Term Food Storage and blocks light oxygen and moisture. MANY USES: Good size for spices, supplements, candies and other small items. Laboratories use them for samples and storage. THE BEST MATERIALS: This is a 5 layer 5.0 Mil PET Aluminum Foil Mylar Bag with complete protection from oxygen and moisture. Please check what you are getting with other listings; most of the cheaper bags on Amazon are 2.5-4.0 mil. SHORT OR LONG TERM STORAGE: Secure ziplock top provides convenient short term storage (with or without oxygen absorber) or top can be heat sealed to protect your products long term.