Description

Printed postal boxes are branded mailing cartons for businesses that want packaging to carry print as well as perform during dispatch. They are commonly used for ecommerce orders, subscription products and direct-to-customer deliveries where a plain outer box would miss a useful branding opportunity. The specification can combine suitable dimensions, corrugated construction and artwork planned around the finished postal format.

Why Print Matters on Postal Packaging

A postal box is one of the few physical brand touchpoints an online customer receives after checkout. Printing can carry a logo, campaign artwork, instructions or a simple brand message across panels that remain visible during packing and opening.

However, good print starts with the structure. Artwork should be positioned on the dieline only after the box size and panel layout are understood. A design that looks balanced on screen can sit too close to a fold, tuck or edge once the box is erected. Therefore, print and structure need to be considered together.

The exterior also has a practical job. Carrier labels and tape may cover part of the surface, so important branding should not rely on areas likely to be obscured during fulfilment.

What Makes Printed Postal Boxes Practical?

Useful postal packaging combines presentation with a structure that works for packing and delivery.

Custom dimensions: plan the internal size around the product, retail carton and any protective material.
Branded print: use suitable panels for logos, colours, messages or instructions.
Mailer-style opening: a hinged-lid format can create a tidy opening sequence and organise presentation.
Internal print: where the structure and print specification allow it, the inside can carry a message or supporting graphics.
Optional inserts: a fitted insert can locate products, separate components or improve presentation when there is a clear practical reason.

Each feature should solve a real requirement. A large printed surface is not useful if the box is awkward to pack, and an insert adds little value if it does not improve fit or organisation.

Corrugated Board and Postal Box Construction

Printed postal boxes commonly use corrugated board because the fluted construction gives useful stiffness while keeping the pack relatively light. The appropriate board specification depends on box dimensions, product weight, fragility and expected handling.

Kraft-facing board can suit designs that use the natural brown surface as part of the visual style. White-facing board can provide a brighter base for colour artwork. The finished print appearance can vary with the surface, so artwork should be planned with the chosen board in mind.

Mailer-style postal boxes are usually die-cut so the lid, side walls and locking areas fold into one structure. Tabs and tucks affect usable print space, so exact closure details should be confirmed during specification rather than assumed from a generic box drawing.

Size the Postal Box Around the Packed Product

Start with the product as it will actually be sent. Include any retail packaging, sleeves, lids, accessories or protective wrap that will sit inside the postal box.

Internal dimensions matter because they control how the product fits after assembly. Too much empty space can allow movement and require more void fill. Too little space can make packing difficult or leave no room for an insert.

If the packaging must fall within a particular postal service size band, check the finished outer dimensions and packed weight against the carrier’s current rules before approving the box specification. Postal limits can affect both format and delivery cost.

Plan Artwork for the Finished Box

The dieline shows where panels, folds, cuts and locking areas sit before the box is assembled. It is an essential artwork guide, but the buyer should also consider what the customer sees on the finished pack.

The lid is often a strong branding area because it remains visible before opening. Side panels can carry supporting information, while inside print can continue the visual identity after the lid is lifted. There is no need to cover every surface.

Keep critical text, logos and small design details away from folds and structural areas. Also leave sensible room for a shipping label. Free design support from Personalized Mailer Boxes can help with artwork positioning, print areas and preparing the layout around the final dieline.

Different printing processes may suit different materials, artwork and production requirements. The process should be chosen for the actual project rather than treated as a universal option.

Printed Postal Boxes for Different Order Types

Printed postal packaging works well where the same pack format is used repeatedly and customers receive the parcel directly.

Typical uses include:

ecommerce orders containing clothing, accessories, stationery or small homeware;
subscription packs where the outer box forms part of the recurring customer experience;
beauty, grooming or lifestyle products packed in their own retail containers;
books, printed products and small boxed goods that suit a closely fitted mailer;
promotional, launch or influencer packs where printed presentation matters;
gift sets that may need dividers or a fitted internal arrangement.

The product still determines the structure. Fragile, heavy or irregular items may need additional protection, while soft or lightweight goods have different internal requirements. Printed packaging should be specified around the contents rather than selected only for appearance.

Inside Printing, Inserts and Other Details

Inside print can create a clear difference between the transit-facing exterior and the customer-facing opening experience. A business may prefer restrained outside branding with stronger graphics under the lid, or the reverse. Either approach can work if the artwork respects the structure.

Inserts can also be useful when a product should stay in a fixed position or several items need separation. Corrugated or paperboard fitments may suit different applications, although the insert material and shape should follow the product and box specification.

Features such as tear strips, peel-and-seal elements or alternative closures may exist on some postal formats, but they should not be treated as standard on every printed box.

Why Work With Personalized Mailer Boxes?

Personalized Mailer Boxes manufactures custom packaging in-house. That allows box dimensions, structural requirements and artwork to be discussed as connected parts of one specification.

For printed postal packaging, this matters because changing a box size can alter panel proportions and therefore affect the artwork layout. Keeping structure and print aligned reduces the risk of preparing graphics for a format that later changes.

Free design support can help with print preparation, panel positioning and dieline use. Once the specification and artwork requirements are agreed, completed orders also qualify for fast and free UK delivery.

What to Provide for a Printed Postal Box Quote

A useful enquiry should include enough information to define both the box and the print:

Tell us what the postal box needs to hold.
Provide the packed product dimensions.
Confirm the quantity required.
Explain whether the order contains one item or several products.
Mention any need for inserts, dividers or protective material.
Describe the preferred appearance, such as kraft-facing or white-facing board.
Send existing artwork, or use the available design support to prepare the layout.
Identify any important carrier-size requirements before final dimensions are confirmed.

These details provide a practical basis for discussing structure, print coverage and the finished packaging.

Frequently Asked Questions

What are printed postal boxes?

Printed postal boxes are mailing cartons with branding, graphics or information applied to suitable panels. They are commonly specified for ecommerce and direct-to-customer deliveries where the outer packaging also acts as a brand touchpoint. Size, board, structure and artwork should be planned together.

Can printed postal boxes be made to custom sizes?

Yes. Custom dimensions can be developed around the product and its packing requirements. Measure the product in the condition in which it will be dispatched, including retail packaging, inserts or protective wrap. Agree the required internal space before positioning the final artwork.

Can I print both the inside and outside of a postal box?

Potentially, yes, depending on the board, structure and production specification. External print can carry visible branding during delivery, while internal print appears during opening. Artwork should account for tabs, folds and any insert that may cover part of the inside surface.

Are printed postal boxes suitable for Royal Mail?

They can be, provided the finished parcel meets the size, weight and service rules for the Royal Mail option you intend to use. Check current Royal Mail limits before finalising a size for a particular postal band, especially where keeping within a specific format matters commercially.

Which material is suitable for printed postal boxes?

Corrugated board is commonly used because its construction provides useful stiffness for mailing applications. Kraft-facing and white-facing surfaces can create different visual results. The appropriate board should be selected according to product weight, box size, handling conditions and the intended print appearance.

Do printed postal boxes need inserts?

Not always. An insert is useful when it needs to locate a product, separate several items or organise presentation. Products that already fit securely may not need one. The decision should follow the contents and packing process rather than treating an insert as a default feature.

What artwork should I provide for printed postal packaging?

Provide your existing branding or print artwork if it is ready. The artwork then needs to work with the final dieline and panel layout. Personalized Mailer Boxes also provides free design support to help with print areas, positioning and preparation for production.

Request a Quote for Printed Postal Boxes

Send your product dimensions, quantity, artwork and packing requirements to Personalized Mailer Boxes. We can discuss the box structure, print layout and any internal components needed, then prepare a quotation for printed postal boxes built around your actual order format.

Personalized Mailer Boxes Specifications

Personalised mailer boxes can be made from different materials, board grades, flute types, print methods and finishes. The right mix depends on how heavy your product is, how you pack it, the impression you want to make and how the boxes will travel to your customers. These tables set out the main options for our custom mailer boxes. The final choice depends on your box design, dimensions, artwork and order requirements. If you’d rather talk it through, request a quote and we’ll help you narrow it down.

Materials
Flutes
Printing
Finishes
Sizes and styles

Mailer box materials and board options

Materials and board options for personalised mailer boxes
Material	Typical specification	Best for
Kraft corrugated board	Single-wall or double-wall, with a natural brown outer liner or a printed finish where suitable	Kraft mailer boxes, subscription boxes, eCommerce orders and brands after a natural look
White corrugated board	Single-wall or double-wall with a white outer liner (subject to availability)	Printed mailer boxes, branded eCommerce packaging, promotional boxes and product presentation
Printed corrugated board	Corrugated board printed by a suitable digital, flexographic or lithographic process	Custom-branded mailers, subscription boxes, product launches and online retail orders
Folding carton board	Roughly 210–600 gsm, depending on the board grade	Lightweight cartons, inserts, sleeves and matching branded packaging
Reinforced corrugated board	Selected heavy-duty single-wall and double-wall builds	Heavier products and shipments that need extra strength in transit

Corrugated flute options for mailer boxes

The flute is the wavy layer between the outer liners. It sets how thick, strong and cushioned the board is, and it changes how smooth the printed surface looks. These heights are approximate industry figures and leave out the outer liners.

Corrugated flute types, approximate heights and typical uses
Flute	Typical flute height	Best suited to
F flute	Approx. 0.5–0.8 mm	Slim, compact boxes where a smooth printing surface matters
E flute	Approx. 1.2 mm	Personalised mailer boxes, subscription boxes and lightweight eCommerce orders
B flute	Approx. 2.4 mm	Stronger mailers and shipping cartons that need better puncture and stacking resistance
C flute	Approx. 3.6 mm	Transit packaging that needs extra cushioning and compression strength
EB / BC double wall	Two flute profiles with additional liners	Heavier products and shipping uses that need a stronger, more rigid box

Printing and colour options

Your artwork, quantity and board all affect which print method makes sense. Here’s what each option does.

Printing and colour options for custom mailer boxes
Option	What it does	Worth knowing
CMYK full colour	Reproduces logos, photographs, illustrations and gradients	Ideal for colourful, detailed artwork
PANTONE® spot colours	Matches a specific brand colour more closely than four-colour printing	Results can vary with the board, coating and print method
Inside and outside printing	Prints the exterior and interior, for branded messages, patterns or product information	Available on selected mailer boxes; adds to the unboxing experience
Digital, litho and flexo	Three printing methods we can use, depending on the project	The best fit depends on material, artwork, quantity and finish

Finishes and extra features

A finish changes how your mailer boxes look and feel in the hand. What’s available depends on the material and production method, so tell us what you have in mind and we’ll confirm what works for your box.

Finishes available for personalised mailer boxes
Finish	What it gives you
Matt lamination	A smooth, understated surface with little glare
Gloss lamination	A shiny surface that makes colours look vivid
Soft-touch lamination	A velvety feel that suits premium presentation
Aqueous coating	A water-based coating that adds light surface protection
Varnish	A clear coating with a matt or gloss look
Hot foil	Metallic detail, often used for logos and borders
Spot UV	Glossy highlights on chosen areas, so a logo or pattern stands out
Embossing and debossing	Raised or recessed detail for added texture

Where they suit the box design, you can also add the features below.

Extra features for custom mailer boxes
Feature	What it does
Custom inserts	Hold your product in place during delivery
Dividers	Keep several items separate inside one box
Die-cut windows	Let customers see part of the product
Tear strips	Make the box easy to open
Peel-and-seal closures	Give a secure closure that’s quick to seal when packing

Your logo, brand colours, printed interiors, promotional messages and original artwork can all be added, so the look stays consistent from delivery through to unboxing.

Custom sizes and box structures

Instead of squeezing your product into a standard size, we can make mailer boxes to fit it. These are the styles customers ask for most.

Personalised mailer box styles and what they suit
Box style	Best for
Custom mailer boxes	Branded eCommerce orders that need a practical, printable box
Self seal mailer boxes	Quicker packing with an integrated adhesive closure
Tear strip mailer boxes	A clear, controlled opening point for the recipient
Subscription boxes	Repeat orders with a consistent branded look
Mailer boxes with inserts	Holding products in position and keeping items apart
Postal boxes	Printed branding on postal and parcel orders
PR and campaign boxes	Press sends, influencer packs and giveaways

Box size, board strength and structure need to work together, so your product fits well, stays protected and packs efficiently. When you ask for a quote, it helps to send the following.

Information to send when requesting a mailer box quote
What to send	Why it matters
Product dimensions	So the box can be sized to fit
Approximate packed weight	Helps us choose a suitable board and flute
Preferred box style	Sets the structure, if you already know what you want
Internal or external measurements	Please say which. It changes how the finished box fits, so it’s worth being clear
Quantity and artwork	Affects pricing, print method and finishing. A logo is enough to get started
Delivery postcode and date	Lets us check timing before production starts

Choosing the right specification

Picking personalised mailer boxes is about more than choosing a design. The material, flute, structure, print method and finish all need to suit your product and its journey to the customer. Our free design support can help you work through the options and agree a specification before production starts.

Standard production is typically around 8 to 12 business days after artwork approval for suitable specifications. Complex inserts, special finishes or larger quantities can take longer. Low MOQ options and fast, free UK delivery are available, subject to the order specification and delivery terms.

Get a Custom Box Quote

Prefer to talk? Call 07862 607 575 or email hello@personalizedmailerboxes.co.uk.

Colour note: PANTONE® is a registered trademark of Pantone LLC. We mention PANTONE® colours to describe our colour-matching options. The final colour can vary with the board, surface coating and printing process, so if an exact brand colour matters, approve a print proof or physical colour reference before production.

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Description

Why Print Matters on Postal Packaging

What Makes Printed Postal Boxes Practical?

Corrugated Board and Postal Box Construction