Royal Mail Large Letter

Royal Mail large letter size postal boxes, bags and envelopes

If you need postal packaging that meets the Royal Mail large letter size category, we’ve got a massive range of solutions available immediately from stock. From specially designed and made postal boxes which go right up to the limit to give you the maximum possible packing space, to protective envelopes and bags that will ensure you don’t pay any more for your postage than you need to. But don’t forget that when packing book boxes and padded or polythene envelopes, it is possible to go over the large letter height (25mm) so we’ve allocated these based only on the length and width of the products listed. Find out more information on Royal Mail postal sizing here.

  1. Economy Large Letter Boxes

    Economy Large Letter Boxes

    5 Sizes In Stock
  2. Brown Large Letter Boxes

    Brown Large Letter Boxes

    8 Choices In Stock
  3. White Large Letter Boxes

    White Large Letter Boxes

    8 Choices In Stock
  4. Post Office Large Letter

    Post Office Large Letter

    5 Sizes In Stock
  5. Sale Brown EconoBook Boxes

    Brown EconoBook Boxes

    7 Sizes In Stock
  6. EconoBook Boxes With Adhesive Strip

    EconoBook Boxes With Adhesive Strip

    5 Sizes In Stock
  7. ColomPac® Book Boxes

    ColomPac® Book Boxes

    9 Sizes In Stock
  8. Sale Gold Bubble Envelopes

    Gold Bubble Envelopes

    11 Sizes In Stock
  9. Sale White Bubble Envelopes

    White Bubble Envelopes

    12 Sizes In Stock
  10. Gold Mail Lite Envelopes

    Gold Mail Lite Envelopes

    11 Sizes In Stock
  11. Sale White Mail Lite Envelopes

    White Mail Lite Envelopes

    11 Sizes In Stock
  12. Sale Grey Mailing Bags

    Grey Mailing Bags

    35 Choices In Stock
  13. Coloured Office Envelopes

    Coloured Office Envelopes

    26 Choices In Stock
  14. Sale White Card Envelopes

    White Card Envelopes

    27 Sizes In Stock
  15. Sale ColomPac® Premium Rigid Envelopes

    ColomPac® Premium Rigid Envelopes

    10 Sizes In Stock
  16. ColomPac® Premium White Corrugated Envelopes

    ColomPac® Premium White Corrugated Envelopes

    1 Size In Stock
  17. ColomPac® Lightweight Horizontal Envelopes

    ColomPac® Lightweight Horizontal Envelopes

    4 Sizes In Stock
  18. ColomPac® White Courier Parcel

    ColomPac® White Courier Parcel

    1 Size In Stock

The Royal Mail large letter size was introduced in 2006 as part of the new Pricing in Proportion (PiP) policy. A large letter can be no larger than 353 x 250 x 25mm (a normal letter can be only up to 240 x 165 x 5mm) with a maximum weight of 750g. The cost of paying small parcel rates (the next size up from large letter) can be significantly more, so being able to quickly source postal boxes and envelopes you can be sure are the right size is a great way of keeping control of your outgoings.