Our heavy duty turkey brine bags are made of FDA and USDA approved material for use with food. They are a thick 4 mil that is 120% thicker than a standard zip top bag. Measuring 20" by 24".  Other great uses for our bags is when preparing large cuts of meat for grilling and smoking, but need a something to store in overnight. Measuring 20 inches by 24 inches these are large enough for a 25 pound turkey, 20 pound brisket, half dozen slabs of ribs, or transporting wild game from the field to the butcher. Each package comes with 4 bags.