These bags help provide unbeatable freezer protection from freezer burn with Grip n Seal technology. The triple system seal features an extended tab, easy grip texture and a double zipper. This makes it easier to open and close the bag, while the airtight double zipper ensures that each plastic freezer bag blocks out air, which means less wasted food and more money saved.For up to 12 weeks protection for your food.17.7 cm X 18.8 cm