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Postal Boxes
Custom postal boxes made to fit Royal Mail and courier size bands, so you post efficiently and still arrive in a branded box.
About our box
Postal Boxes, made to your size
Postage is one of the biggest costs for an online business, and the size of your box decides the price band you pay. Our custom postal boxes are made to fit UK size bands such as Large Letter and Small Parcel, with self-locking mailer construction that keeps contents secure without tape.
Why choose our postal Boxes
A box designed around postal limits can save money on every order. Printed with your branding, it also turns a routine parcel into something customers recognise instantly.
Popular uses
- Royal Mail Large Letter parcels
- Small Parcel shipments
- Courier deliveries
- Marketplace orders
- Returns-friendly packaging
Materials, print and finishes
- Sized to Royal Mail and courier limits
- Self-locking, no tape needed
- Optional tear strip and peel-and-seal returns strip
- Printed outside, inside or both
Add a second peel-and-seal strip and customers can reuse the box to send a return, which keeps returns simple and reduces waste.
Sizes and dimensions
Every order of postal Boxes is made to your dimensions in millimetres (length × width × height). Not sure of the size? Choose “Not sure — suggest a size” in the options above and tell us what you are packing, and we will recommend dimensions and show them in your mock-up. You can also order several sizes in the same design to cover your whole range.
Related packaging
Comparing options? Take a look at Shipping Boxes, Small Cardboard Mailer Boxes and Ecommerce Mailer Boxes, or browse all custom mailer boxes and our wider custom packaging range.
How to order
Choose your size and options above and request a free quote. We reply within 24 hours with your price and a free 3D mock-up, and nothing is printed until you approve it. Orders are delivered across the UK in 12–14 working days; see our delivery information. The “From” price is our bulk price per unit, excluding VAT, and larger quantities bring the unit price down. Selling clothing too? We also make custom apparel to ship in your boxes.
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Specifications
| Postal sizes | Large Letter, Small Parcel or custom |
|---|---|
| Style | Self-locking mailer, tape-free |
| Board | Kraft or white corrugated (E-flute or B-flute) |
| CMYK and Pantone, outside, inside or both | |
| Finishes | Matte, gloss or soft-touch; foil, spot UV, embossing |
| Size | Made to your inside dimensions (mm) |
| Recyclable | Yes, with UK paper and card recycling |
| Minimum order | Low minimums |
| Delivery | 12–14 working days after approval, UK-wide |
| Category | Custom Mailer Boxes |
Fill your boxes with your own merch
Hoodies, tees, sets, caps and socks — cut and sewn to your design from 20 pieces per style, packed in your boxes and delivered together.
Explore custom apparelHow it works
Tell us your box
Size, print and quantity — or ask us to suggest a size.
Free 3D mock-up
See your design on the box before anything prints.
We print and make
Printed, die-cut and quality checked.
Delivered flat
Tracked UK delivery in 12–14 working days.
Questions about Postal Boxes
Can you make boxes to Royal Mail size limits?
Yes. Tell us which service you use and we will design the box to stay within the limits, including board thickness.
Do you offer a returns strip?
Yes. We can add a tear strip to open and a second adhesive strip so the box can be reused for returns.
How much do postal boxes cost?
The “From” price on this page is our bulk price per unit, excluding VAT. Your exact price depends on size, quantity, print and finish, and we send it with a free mock-up within 24 hours.
How long does delivery take?
12–14 working days after you approve your mock-up, with tracked delivery anywhere in the UK.
Ready to see your box?
Send your size and logo — free 3D mock-up and quote within 24 hours.