SIZE DETAILS: Medium size:7.9*7 inch, 25 packs MATERIALS: Storage bags are made from FOOD-GRADE and thick plastic, NON-TOXIC and BPA free. Storage bags are reusable, simply by washing after use. Contribute to environmental protection. STRUCTURE:Freezer bags have dual-track zip, easy to seal and open. The zip lock works well and seals the bags securely. Excellent structure is at bottom which has a gusset for expand, they can store a good amount of food or liquid, plus the wide bottom means you can stand the bag up on the counter to fill it up. DESIGN: Ziplock bags are mainly transparent so is obvious what is in the bags. There is a white rectangle on the bags, you can note down the contents with a marker. This is a resealable bags. MULTIPURPOSE & SERVICE: Sealed bags are ideal for fresh fruits, meat, vegetable, sandwich bags, fish, dinner leftovers, snacks, and various nuts, and can store the small items when we traveling.