340mm x 110mm x 110mm White Small Parcel Die Cut Postal Mailing Shipping Boxes Dimensions: 340mm (length), 110mm (width), 110mm (height). Dimensions are INTERNAL. Manufactured from rigid 2mm thick B-Flute cardboard. White Outside, Brown Inside. Sold flat with folding required Our Cardboard Postal Boxes are versatile boxes for shipping all manner of small goods in a lightweight and compact form. These boxes provide ample protection for fragile goods in transit and are more compact than bubble wrapping an item. Boxes are sent flat with some folding required.