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Your Vision, Our Packaging Perfection
Custom Boxes UK's free design team created exactly what I imagined. "Maybe saved many on a designer!
Mishel K. · Verified · 16 Jun 2026
Rated 4.5 out of 5 based on 95 reviews Trustpilot
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Postage Mailer Box
Show that your mail is special with our professional and stylish Postage Mailer Box that you can get at Custom Boxes UK. Thanks to their design, our mailer fits with the official sizing for postal boxes Royal Mail. Because Postal boxes wholesale kraft or corrugated components, they get noticed during transit and help promote your company. No matter if you run a small or large company, we have postage mailer boxes in bulk as well as quantities as low as one box.
Prints, stickers, inserts or applying a brand can add a professional look to your layout.Select postage mailer box for sale that are flat packed to make storage easy and assembly fast. We offer custom mailer boxes with logo to ensure your items get to your customers safely and neatly packed in styles that follow modern branding and UK regulations.
Get Your Custom Quote
Send your specs and get professional pricing back within 2 hours on business days.
Product Specifications
| Box style | Postage Mailer Box |
|---|---|
| Dimensions | All custom sizes and shapes |
| Minimum quantity | 100 boxes |
| Board | Greyboard 1.5mm – 3mm |
| Wrap stock | 128–157gsm art paper, kraft, or textured |
| Closure | Two concealed neodymium magnets |
| Format | Assembled or collapsible |
| Printing | Offset and digital, CMYK + spot colour |
| Lamination | Matte, gloss, or soft touch |
| Add-on finishes | Spot UV, foil, embossing, debossing |
| Inserts | Foam, EVA, pulp, card — velvet or silk lined |
| Proof | Free digital proof, sample on request |
| Turnaround | 12–15 business days after approval |
| Shipping | Flat rate, tracked |
Customization options
Offset Printing
Digital Printing
Pantone Colors
Soft Touch Lamination
Spot Gloss UV
Hot Foil Printing
Blind Embossing
Window Patching
White Kraft
Natural Brown Kraft
Textured Paper
Grey Chipboard
Frequently asked questions
What is the minimum order for Postage Mailer Box?
100 boxes. Per-box pricing drops at 500, 1,000, and 5,000 units, so ask for tiered pricing if you expect to reorder.
How long does an order take?
12–15 business days from approved proof to dispatch. Rush production is available on request for an additional charge.
How long does an order take? Can you help with the design?
Yes. Our design team prepares dielines, sets up your artwork, and produces the proof at no cost, whatever the order size.
Do you provide samples before production?
very order includes a free digital proof. Physical samples of your exact box can be produced on request before the full run.
Which payment methods do you accept?
Credit and debit cards, PayPal, and bank transfer. Larger runs can be split into a deposit and a balance on dispatch.
Are the materials eco-certified?
Boards are FSC-certified, and inks, coatings, and adhesives meet food-contact standards where the box needs it.
Still have a question?
We reply within 2 hours on business days — email us or call your dedicated representative.
Contact our team →
Postage Mailer Box
From
$0.10
per box · MOQ 100