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Large Letter Postal Boxes

Large Letter Postal Boxes

Browse our full range of large letter postal boxes in the table below or use our handy Box Finder if you need help locating the right parcel.

Box Size

Product Info

Boxes Per Pack

Price Per box (ex. VAT)

1-11 Packs

12-19 Packs

20+ Packs

1 Pallet

Number of

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9 x 6.3 x 0.6" 9 x 6.3 x 0.6"

22.9 x 15.9 x 1.6cm 22.9 x 15.9 x 1.6cm

229.1 x 159 x 16mm 229.1 x 159 x 16mm





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12.8 x 8.9 x 0.6" 12.8 x 8.9 x 0.6"

32.6 x 22.7 x 1.6cm 32.6 x 22.7 x 1.6cm

325.9 x 227.1 x 16mm 325.9 x 227.1 x 16mm





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Why Buy Large Letter Postal Boxes?

We make all our large letter postal boxes with high-quality corrugated cardboard. These durable large letter mailing boxes ensure that your shipped goods arrive safely.

If you're searching for PIP large letter boxes, these boxes are ideal as they meet Royal Mail guidelines. If you would like to learn more about Royal Mail large letter box dimensions you can read our full packaging guide.

Discounts On Large Letter Postal Boxes

Need a high number of large letter postal boxes for your business? Order in bulk from us and take advantage of our amazing discounts.

Next Working Day Delivery

Need a large letter cardboard box by tomorrow? Don't panic as we offer next working day delivery as standard, so you can get your package out on time. Order before 11:45 am Monday-Friday and get same day despatch.

Our Postal Boxes

As well as large letter cardboard boxes we supply a wide range of postal boxes, whether you need a small, medium, white or brown package.