Plastic Zip Lock Bags, Resealable Packaging Bags, Top Seal, Self Seal Bag, Rectangle, ClearSize: about 70mm long, 50mm wide, unilateral thickness: 2 Mil(0.05mm).âEASY TO USE: The monorail zippers of our resealable plastic bags are easy to lock and keep closed. The sealed bags can prevent dust and moisture from entering and keep the items dry and dust-free, especially for metal and silver products. âSTORAGE & ORGANIZATION: These bags make it easy to organize and store your jewelry, rings, earrings, sewing supplies & other small parts.