Perfect for mailing your items at a cost efficient price, while maintaining great presentation. 10,000 strong metallic blue mailing postal bags, size 5"x7" (120mm x 170mm), with 40mm 'peel & seal' lips. These are premium quality bags, co-extruded and made from 100% virgin polymer. All our mailing bags are fully opaque - items placed inside the bags are not visible through the film.