These White Postal Boxes are ideal for the shipping of a variety of lightweight products up to 112 x 163 x 20mm. Made from high quality single wall cardboard, these postal boxes are both durable and straightforward to assemble; with a quick and simple packing process and made from a robust cardboard material, our white postal boxes are ideal for the safe transportation of your goods. Designed to fit within the Royal Mail Large Letter sizing, they can help you save on postage costs. Other features include: Fefco style 0421 Supplied flat packed in bundles of 50 Recyclable, plastic-free, made from sustainable materials