Postal mailing boxes are a fantastic choice when it comes to shipping and posting small to medium size items & products, keeping them safe, secure and presented professionally. The boxes come flat packed in bundles of 10, 25, 50, 100 and are easily formed into boxes with self locking flaps that secure the boxes formation tightly and smart. Once constructed they have triple layered thickness for the exceptional protection of your products. Commonly used by online eCommerce stores and vendors on third party platforms as mailing cartons. They are small, lightweight, durable and cost effective. The size qualifies as under the Royal Mail small to medium parcel size guidelines and are the ideal packaging solution for the smaller size products that are thin, flat or low height. Internal dimensions (LxWxH): 250mm x 175mm x 80mm