0427 mailing boxes

A first-class packaging solution – whatever you’re putting in the post, put it in a 0427 mailing box from UK Packaging.

Made from high-strength Kraft board with double-lined sides, our 0427 mailing boxes feature self-locking tabs that tuck in at the front to secure the lid in place. They offer strong, sturdy protection for all kinds of item, while giving the package a professional, neat finish.

A popular packaging solution for retail businesses, online sellers and subscription services, 0427 mailing boxes are simple to open, easy to re-use and don’t require any tape or sealant. And, because they are supplied flat-packed for self assembly, they won’t take up precious room in your warehouse.

Best of all though, all of our 0427 mailing boxes fit the Royal Mail’s small parcel or large letter categories – so shipping your products in style won’t mean spending a fortune.

Check out our range of mailing boxes and place your order with us today.


Small parcel and large letter mailing boxes

Our 0427 mailing boxes are available in 16 different sizes, each carefully designed to help you keep postage costs to a minimum.

As per Royal Mail guidelines, our large letter mailing boxes measure no more than 35.3cm long, 25cm wide and 2.5cm thick, and our small parcel mailing boxes measure up to 45cm long, 35cm wide and 16cm thick.

Large letter packages can weigh up to 750g, while small parcels can be up to 2kg in weight.

Alongside our range of 0427 boxes, we also offer a range of Amazon-style book wrap packaging, ideal for flat items such as books, games and DVDs. Our book-wrap is made from rigid single wall corrugated board, features a self-seal lip and tear-off strip opening, and comes in a choice of four sizes.

These are again predominantly classed as small parcels, while our A3 book-wrap, the largest in our range, is classified as a medium parcel.

Medium parcels can weigh up to 20kg, and are the largest packages that can be sent via Royal Mail.

As well as our 0427 mailing boxes and book wrap, UK Packaging also offers a range of postal bags, Jiffy bags and postal tubes to suit a wide range of requirements.

Postal tubes are ideal for posters, documents and planning papers, and come in more than 15 different sizes. Most of these can be sent via Royal Mail as a medium parcel.

Why choose mailing boxes from UK Packaging?

A one-stop shop – Alongside our 0427 mailing boxes, book wrap and mailing bags, we also provide all the other items you need for an effective shipping operation. From parcel labels to void-fill, we have everything you need all in one place.

Recyclable and reusable – Made from recyclable materials, our mailing boxes are ideal for businesses committed to environmental sustainability. Strong enough to be re-used multiple times, they don’t need to be disposed of after single use, showing customers you’re serious about your green goals.

Added value – Our high-quality mailing boxes offer fantastic value, but we do more than simply beat your latest quote. Our experts can help you find the right packaging solutions for you, assessing the efficiency of your packing operation to help you maximise profits.

Fast, efficient delivery – Owners of our own fleet and five specialist depots across the UK, we can ensure fast delivery of your mailing boxes wherever you are in the country.


Order your mailing boxes today

Browse our range of postal boxes and place your order today – just give us a call on 020 8801 8144 or contact your local depot for expert advice on the right packaging solution for you.