These Heat Sealable Flat Bottom Gussets with Paper Insert are an excellent choice for packaging food products and irregular-shaped items. They measure 5" x 3" x 12" and have side gussets that expand when filled. That means these bags have built-in length and flexibility for packaging items like baked bread, muffins, cookies, or a fancy cupcake. Made from high-clarity BOPP material, this simple lunch sack style bag is also heat sealable and easily stands upright on retail shelves. Heat seal or fold over the bag and attach a header card, label, or twist tie to close.