Packaging Fundamentals · In-depth guide
The Complete Guide to Custom Packaging in the UK
Published Reviewed
Custom packaging is packaging made to your product's dimensions and printed with your design, rather than bought from stock. In the UK it usually means rigid boxes, folding cartons, mailer boxes or corrugated boxes, each specified by style, board, print, finish and quantity. This guide explains what each of those choices does, how ordering works and what to send for an accurate quotation.
What custom packaging means
A stock box is made in a standard size and bought off the shelf; you fit your product to it. A custom box is made to fit your product, in the style, board and print you choose. Between the two sits the common halfway house: a stock box with a printed label or sticker.
| Stock box | Stock box with a label | Custom packaging | |
|---|---|---|---|
| Size | Standard sizes only | Standard sizes only | Made to your product's internal dimensions |
| Plain | Label or sticker on a plain box | Printed across every panel, inside and out if needed | |
| Board | Whatever the stock range uses | As stock | Chosen for the product's weight and route to market |
| Fit | Often loose, needs void fill | Often loose | Close fit, often with a fitted insert |
| Minimum | Single boxes | Single boxes | A production run, from 50 boxes |
| Best for | Trials and one-off shipments | Early sales, very small volumes | A product you sell regularly and want presented properly |
The main reason to move to custom packaging is that the box stops being a compromise. It fits the product, carries the information and the branding in one, and behaves the same way on every order. For a practical walk-through of the decision, see choosing the right packaging for your product.
What packaging does for your product
Packaging has four jobs. A good specification weighs all four; a poor one designs for one and forgets the rest.
It protects
The first job is to get the product to the customer in the condition it left you. That means a board strong enough for the weight, a close fit so the product cannot move, and an insert where items could touch or break. Protection is specified, not assumed: the board, flute and insert are chosen for the product and the route it travels.
It informs
Packaging carries what the customer, the retailer and the law need to see: the product name, what it is, how to use it, barcodes, ingredients or safety text where they apply, and recycling information. Planning where this goes before the design is finished is what stops it being squeezed onto a side panel later.
It presents the product on a shelf
On a shelf, the box is the product until someone picks it up. It has a second or two to be noticed and understood from a distance. What does that work is practical: a clear front panel, a consistent colour that makes a range recognisable, a name that reads at arm's length, and sometimes a window that shows the product itself. A range with consistent packaging reads as a block on the shelf, which makes each product easier to find.
It sells and is remembered after purchase
Packaging keeps working after the sale. For products sold online, the box is the first physical contact a customer has with your business, and the opening moment is often photographed and shared. Inside print, a printed message, tissue and a product held neatly in an insert all make that moment deliberate rather than accidental.
Packaging also shapes what the customer thinks the product is worth. A solid rigid box with a magnetic lid tells the customer something before they see the product; a flimsy box with a loose product tells them something else. Well-made boxes are often kept and reused for storage, which keeps your name in front of the customer long after the sale, and a pack a customer recognises makes the repeat purchase easier.
None of this needs expensive finishes. It needs a box that fits, a design that suits the product and the customer, and one or two details done well.
The main types of custom packaging
Almost all custom packaging belongs to one of a small number of families.
| Type | What it is | Delivered | Typical uses |
|---|---|---|---|
| Rigid boxes | Greyboard, usually 1.5–3 mm, wrapped in printed paper | Assembled, unless collapsible | Gift sets, fragrance, jewellery, spirits, electronics, corporate gifts |
| Folding cartons | Printed folding boxboard or SBS, typically 250–400 gsm | Flat, side seam glued | Cosmetics, food, supplements and everyday retail products |
| Mailer boxes | Die-cut corrugated with a fold-over lid, closing without tape | Flat | E-commerce orders, subscriptions, PR send-outs |
| Printed corrugated boxes | Single or double wall corrugated shipping and display boxes | Flat | Heavier products, trade shipments, bulk packs |
| Gift boxes | Rigid or folding presentation boxes | Depends on construction | Corporate gifts, hampers, seasonal ranges |
| Custom inserts | Card, corrugated, foam or moulded pulp fitted inside a box | Flat or formed | Holding products in place, separating sets |
Our custom product boxes and retail packaging pages group these by what you are selling and where.
Box styles
Within each family, the style decides how the box opens and closes, how strong the base is and how quickly it can be packed. A few examples show the range:
- A crash-lock bottom carton has a pre-glued base that locks when the carton is squared open, for heavier products and fast packing.
- A magnetic closure box is a rigid box that opens like a book and closes on concealed magnets.
- A roll-end tuck front mailer folds up from a single blank and closes with a tuck lid and locking tabs.
Every style we make is listed under boxes by style, and our box construction decision guide compares them.
Materials and board
The board decides how the box protects, how it prints and how it feels. UK suppliers specify carton board in gsm and microns, corrugated board by flute, and rigid box board in millimetres.
| Board | Typical specification | What it is used for |
|---|---|---|
| Folding boxboard and SBS | Typically 250–400 gsm | Folding cartons, sleeves and card inserts; SBS for the brightest white and finest print |
| Kraft board | Typically 250–400 gsm, or kraft corrugated liners | Natural-look cartons, mailers and sleeves |
| Corrugated board | E flute about 1.5 mm, B flute about 3 mm, double wall about 4–7 mm | Mailers, transit boxes, displays and inserts |
| Greyboard | Typically 1.5–3 mm | The structural core of rigid boxes |
| Speciality papers | Textured, coloured and metallic papers | Wraps for rigid boxes and premium sleeves |
Heavier is not automatically better. Board that is heavier than the product needs adds weight, storage and postage without adding anything the customer notices. Our packaging materials guide covers each board in detail.
Printing
Packaging is printed as flat sheets before it is cut and folded, which means every panel, and the inside, can be printed in one job.
- CMYK builds full-colour images from four process inks. It suits photographs and complex artwork.
- Pantone spot colours are pre-mixed inks matched to a reference. They reproduce a brand colour consistently across a range and across reprints. See CMYK vs Pantone.
- Litho printing gives fine detail and becomes economical at larger quantities; digital printing needs no plates and suits short runs and several versions. See litho vs digital printing.
- Inside print uses the reverse of the board and is often where the most memorable part of a mailer's design goes. See printing inside your box.
Kraft board prints darker and warmer than white board, and white cannot be printed as a colour on kraft without a white ink underlay. Choose the board before finalising colours.
Finishes
Finishes protect the print and change how the box looks and feels. Free Lamination is standard on every order.
| Finish | What it does | Works best on |
|---|---|---|
| Matt, gloss or soft-touch lamination | A thin film over the print that protects it and sets the surface | Almost everything; matt is the most versatile, soft-touch the most tactile |
| Foil blocking | Metallic or coloured foil pressed on with heat | Logos, names and fine type on rigid boxes and cartons |
| Embossing and debossing | Raises or recesses part of the board | Bold, simple shapes; lids and front panels |
| Spot UV | Clear gloss on selected areas | Contrast against a matt or soft-touch background |
| Window patching | A die-cut opening backed with clear film | Showing the product through a carton |
One well-placed finish, on one focal point, usually does more than several competing for attention. Our overview of luxury packaging finishes explains how they combine.
Inserts
An insert holds the product in position, separates items in a set and presents them in a fixed layout. Card and corrugated inserts are die-cut like cartons; foam suits delicate or high-value items; moulded pulp is a paper-based alternative for heavier products. Plan the insert at the same time as the box, because it changes the internal dimensions.
Sizing your box
Custom packaging is specified by internal dimensions, written as length × width × depth in millimetres. Length and width describe the opening, and depth runs from the opening to the base. Measure the product at its widest points, including caps and closures, weigh it and tell us how it is wrapped or held. We add the clearance and the board thickness.
Two guides cover this in detail: how to measure a box and internal vs external dimensions.
How ordering custom packaging works
Every order follows the same five stages.
- Enquiry and specification. You send the product, its size and weight, the quantity and what the box has to do. We recommend the style, board and finish, and send a quotation.
- Dieline and artwork. We draw the dieline to your size. You or your designer place the artwork on it, and we check the files in pre-press.
- Proof approval. You receive a digital proof and check every panel. Nothing is produced until you approve it.
- Production. The board is printed, finished, cut and creased, then glued, folded or assembled according to the style.
- Delivery. Delivery is included on every order. Your quotation confirms the delivery address and timing.
Our minimum order is 50 boxes. Free Shipping, Free Lamination and No Die Charges are standard on every order. Ask about sample options when you request your quotation.
On timing: tell us your required delivery date and our team will confirm whether the timing is achievable. What takes time is proofing, sourcing speciality boards and papers, each finishing pass and, for rigid boxes, hand assembly. Our guide to how custom packaging is made explains each stage, and minimum order quantity explained covers why runs start where they do.
What affects the cost
Every quotation is built from the same factors. Understanding them helps you decide where to spend and where to save.
| Factor | Why it affects cost |
|---|---|
| Quantity | Setup is the same for a short run and a long one, so unit cost falls as quantity rises |
| Construction | Rigid boxes use more material and hand work than cartons; crash-lock bases need extra gluing |
| Size | Larger boxes use more board and fit fewer blanks on each sheet |
| Board | Heavier boards, double wall corrugated and speciality papers cost more than standard grades |
| Inside print is a second printed side; extra Pantone colours each need their own ink | |
| Finishes | Each embellishment is a separate pass with its own setup |
| Inserts | An extra component to cut, and sometimes to assemble |
| Versions | Each design or size needs its own artwork, proof and setup |
Our cornerstone on what determines packaging cost goes into each factor, and reducing cost without reducing quality shows where savings usually come from.
Choosing packaging with less waste
The most effective sustainability decisions are usually the simplest ones.
- Right-size the box. A box that fits the product needs less void fill, less board and less space in transit. See reducing excess packaging.
- Use the lightest board that protects. Over-specifying adds material without adding protection.
- Keep it mostly one material. A paper-based box with a paper insert is simpler to recycle than one combining board, foam and plastic.
- Think about the finish. Film lamination adds a thin plastic layer. If a plastic-free pack matters to you, discuss coatings or unlaminated board instead.
- Choose recycled or virgin fibre deliberately. Each has a place; see recycled vs virgin fibre board.
Our sustainable packaging guide covers materials, labelling and the UK rules that apply to packaging.
Common mistakes
- Designing before measuring. Artwork drawn to the wrong size has to be redrawn. Fix the size and the dieline first.
- Choosing a box for the shelf when it mostly ships. A folding carton alone is not built for a courier network.
- Sending external dimensions as if they were internal. The finished box ends up a board thickness too big on every side.
- Over-finishing. Foil, emboss, spot UV and soft-touch all on one small box compete with each other and add setup to every run.
- Leaving mandatory information until last. Barcodes and product text need planned space.
- Approving the proof in a hurry. The approved proof is what gets printed.
- Comparing quotations on price alone. Two quotes can only be compared at the same specification and quantity. See comparing packaging quotations.
What to send for a quotation
The more of this you send, the more accurate the first quotation:
- what the product is, its length × width × depth in millimetres and its weight;
- how it reaches the customer: shelf, post, gift or hand;
- the box style, if you know it, or what the box has to do;
- print inside and out, and any finishes you have in mind;
- the quantity, and any alternative quantities to compare;
- how many designs or sizes;
- whether artwork is ready;
- your required delivery date.
Our packaging specification template sets this out as a form you can copy. Send it through the quote form, email quotes@customboxez.co.uk or call +44 7446 230747 (10:00–18:00 UK time). If a term in a quotation is unfamiliar, our packaging glossary defines it.