Plymor 18" x 20" (Pack of 250), 4 Mil Flat Open Clear Plastic Poly BagsWhat size bag to order? Measure your item by its width, height, and depth because the plastic bag needs to fit all the way around it. Item width + item depth = bag width. Item height + item depth = bag height.What is a Mil? "Mil" is the plastic thickness. 4 Mil = .004", thicker than a standard freezer bag and excellent for heavy duty applications.Are the bags food safe? Yes! Because our flat bags are made from virgin LDPE (low density polyethylene), they meet FDA requirements for food contact and storage, and are BPA-Free.How to use the bags? Our various sizes of flat bags are extremely versatile and great for packaging, shipping, or storage. Excellent for organizing and separating samples, food, candy, jewelry, cards, craft supplies, paper, office supplies, supplies, hardware, collectibles, yarn, sewing kits, quilting supplies, toys, clothing, merchandise for resale, or makeup with protection from moisture and dust.Plymor Guarantee: Collecting Warehouse guarantees all Plymor products to arrive free of damage or defects.