100 PCS 2"x2" clear thick 4 mil Zipper bags. The zip bags are thickend to 4 mil (one-side), heavy-duty and durable. While most of the bags of market are 2 mils commonly. The bags are waterproof & dust-proof airtight sealable, all-virgin low density polyethylene (PE). 100% foof grade safe, non toxic & odorless, freezer safe. Please use this easier way to open small bags: Put pressure at the seal between your thumb and index finger, then slide the seal from different directions. As the zip bags foster long term sealability and protect the contents from dust, bugs. moisture and mildew, excellent for packing and separating simples, food, candy, jewelry, bayh bombs, cards, craft supplies, paper, office supplies, school supplies, hardware, collectible, yarn, sewing kits, quilting supplies, toys, merchandise for resale, or makeup.the sizes are the actual available size inside, all manually measured in a flat state, please allow for some errors. In order to ensure that your articles can be fully wrapped, they should be slightly smaller than our bags due to the thickness of your asticles.