Our Bread Bags are gusseted, meaning that they're made to enlarge, allowing any sized loaf of bread to fit perfectly into our clear bread bags. Each bag is about 1 mm thick. These bread bags are - for food. We want you to be positive that our bread bags are healthy and safe to use. The dimensions of our bread bags are 8 x 4 x 18, but they are expandable to fit any bread loaf size. Cable ties are included to assist in sealing the bread bags to keep your bread loaf fresh.