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Mishel K. · Verified · 16 Jun 2026
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Large Letter Boxes
Custom Boxes UK is your number one supplier of versatile and practical Large Letter Boxes that you may use with your postal purposes or even with your door fittings. Whatever size letter boxes you require are either Royal Mail compliant or A4 sized to hold your documents, we have them in different sizes and materials.
Our boxes can be shipped, mailed or can hang in front doors to make safe deliveries. We provide the additional large letter boxes, which are used when the mail is thick and the large letter box which is designed with the use of weatherproof materials. </span>
<p>All the boxes are designed to be durable, stylish and convenient. Our letter boxes come in big sizes that are sold at good prices thus you can be assured of quality, affordability. and delivery anywhere in UK within a short period in case you are buying them in bulk or having your orders customized.
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Send your specs and get professional pricing back within 2 hours on business days.
Product Specifications
| Box style | Large Letter Boxes |
|---|---|
| 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
Product details
Secure Delivery Multi-Purpose Large Letter Boxes:
Large Letters Boxes play an important role in contemporary mail management whether they deliver to the home, the mailroom at the office, or in the e-commerce shipping case. We have many top quality solutions on offer including postal solutions and door solutions at Custom Boxes UK.
Our boxes are made of weather-proof and high strength materials in order to be used as exterior boxes or lighter boxes made with cardboard that can be used in a postal scenario. These are some of the letter boxes which will keep your mails safe, secure and well organised.
Perfect Royal Mail & Document Shipping:
These Large letter boxes Royal Mail are fashioned to fit the official size specifications of the UK which reduces postage costs to businesses.
Perfect for:
- Letters / magazines of size A4
- Books, documents and mailers
- Memberships, subscription, and online shopping products
The A4 standard documents will fit in the large letter boxes range and will not be bent or damaged. An intelligent selection of law firms, publishing companies and education institutions.
Door-Mount Styles & Parcel Styles are available:
Still seeking to get greater convenience at home or at work? Our Large Letters boxes for doors are safe, weatherproof and good looking.
Look at our extra large letters boxes to send a bulkier mail or small parcel. They are perfect when businesses take huge amounts of deliveries or your home has furious online orders.
Bulk Pricing And Customisation:
Large letter boxes for sale are available at competitive prices to wholesalers, contractors and retailers. Looking to be custom made? Put branding, proprietary sizing or design in it to customize it to your brand or property.
The Reason To Choose Custom Boxes UK:
There are several reasons to choose us for Extra large letter boxes as well as printed mailer boxes.
- Royal Mail–compliant postal boxes
- A4 and door-mounted options
- Bulk discounts and fast UK shipping
- Fully customisable solutions for trade or retail
Whether you need postal or parcel box solutions, you want a secure and a stylish standard large letters box: Custom Boxes UK takes care of it all.
Frequently asked questions
What is the minimum order for Large Letter Boxes?
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 →
Large Letter Boxes
From
$0.10
per box · MOQ 100