4 Optional sizes: our mylar zip lock bags come with 4 different sizes for you to choose, which includes 5.51 x 7.87 inch/14 x 20 cm (large), 3.93 x 7.09 inch/ 10 x 18 cm (medium), 3.54 x 6.30 inch/ 9 x 16 cm (small) and 3.15 x 5.12 inch/ 8 x 13 cm (minimal), you can use these storage bags to store various sizes items, convenient for daily storage purposes Quality material: these smell proof pouch bags are made of polyester film and aluminum foil material, durable and firm to use, odorless and non-toxic, waterproof and moisture-proof, good sealing performance, features holographic rainbow color back with transparent front for displaying the product, making your items attractive while easy to distinguish different items Widely applicable: these self-sealing pouch bags are good for packing and storing goods, like nuts, fruits, candy, cookies, chocolate,tea leaf, seasoning, snacks, coffee beans, herbs, grain, beef jerky and more, also nice to store jewelry, earrings, necklace, screw, plastic beads and so on, make your countertop clean, organized and no mess Smell proof function: each holographic mylar bag features a self-sealing strip, can be closed or opened repeatedly for repeated use, when sealed, this bag can prevent moisture, dust and water from entering and ensure that odors stay locked inside, allowing your food stay fresh, keeping things well organized Abundant quantity: you will obtain 120 pieces of aluminum foil food storage bags in 4 different sizes, each size for 30 pieces bags, enough size choices and large quantity to satisfy your daily storage use and replacements