Large Letter Postal Boxes – Royal Mail PiP Size

Slim cardboard postal boxes sized to fit Royal Mail's Large Letter limits, so you pay Large Letter postage instead of parcel rates. They fit through a standard letterbox, so there are no missed deliveries or trips to the sorting office. Ideal for posting fabric swatches, samples, needles, tools, pins and other small, flat items. Key features Royal Mail Large Letter size: 19mm deep to stay within Large Letter (PiP) limits. Don't overfill, or the box may become a small parcel. Peel-and-seal closure: quick to pack with no tape needed. Letterbox friendly: delivered straight through the door. Strong corrugated cardboard: more protection than a padded envelope. 100% recyclable and biodegradable. Supplied flat. Sizes 160 x 110 x 19mm: A6 / C6 size, for swatches, samples and small parts. 320 x 230 x 19mm: A4 / C4 size, for documents, fabric samples and flat items. Need larger quantities? Please get in touch for trade prices.