SIZE:Inside Dimentions: Heavy-Duty 16" x 20"(below the zipper). The bag was thickened to 4mil And Very Thick, Durable.20 Units of the Clear Resealable Bag. They are the most widely used clear bags for packaging retail products. Excellent for organizing and separating samples, food, candy, jewelry, bath bombs, cards, craft supplies, paper, office supplies,hardware, collectibles, yarn, sewing kits, quilting supplies, toys, merchandise for resale, or makeup with protection from moisture and dust. MATERIAL: Odor Free, Water-resistant, Strength Toughness, Strong Sealing, Reusable, Reclosable Zip Bags are made with polyethylene(PE).Uality you can see and feel - our zip bags are completely airtight and waterproof. The poly bags are perfect for documents and flyers. Our reclosable bags eliminate the need for impulse sealers or tape, and are significantly more reliable than resealable cellophane cello bags, flap lock poly bags and regular flat poly bags. The bag was thickened to 4mil and thicker than 2mil. It was still highly transparent.More tenacity, can bear more load, more durable,resealable poly bags are airtight and protects your merchandise from moisture,conducive to long-term preservation. Warm tips: The sizes of the measurements are manual, and there may be errors due to the different testing methods. Pictures and information only for reference, because shooting lights and different color display and other issues may cause a picture of goods and material have a certain color, all to prevail in kind.