Royal Mail Postal Boxes

Browse our full range of cardboard postal boxes shown below. We have a wide range of Royal Mail postal boxes in a variety of sizes to suit any item you need to be posted.

You can also read our handy packaging guide if you need help understanding Royal Mail parcel sizes.

Why Buy Cardboard Postal Boxes?
Whether you're a small business, a sole trader or have started selling online it’s always handy to have a decent stock of postal packaging boxes close at hand.

From large to small, square to flat we supply a wide range of cardboard postal boxes to suit your business needs. Whether you need to post a small parcel or something larger the right box for you is one click away.

We make all our mailing boxes from high-quality corrugated cardboard, helping ensure your package arrives safely. If you’re searching for Royal Mail postal boxes, don’t worry as all our cardboard postal boxes are compatible with Royal Mail guidelines.

We sell both single and double wall cardboard postal boxes giving you a wide variety of options to choose from. All our Royal Mail parcel boxes come flat-packed as standard, helping you save on space.

Use our handy Box Finder if you're having difficulty locating the right boxes for posting.

Our range of Royal Mail postal boxes includes -

Large Letter Postal Boxes
Small Postal Boxes
Medium Postal Boxes
Brown Postal Boxes
White Postal Boxes

Discounts On Postal Boxes
Looking to buy postal boxes wholesale? If you buy in bulk from us you can take advantage of our amazing discounts.

Next Working Day Delivery
In a rush and looking for post office parcel boxes last minute? Don't worry, we offer next working day delivery as standard. Order before 15:00 Monday-Thursday and 11:30 Friday for same day despatch.

Our Cardboard Boxes
Moving house or need other cardboard boxes for shipping for your business? We also supply everything from removal boxes to storage and filing boxes.