Discover our easy guide to picking the perfect shipping box. Learn about size, style, strength, and saving tips to boost your brand. An easy read for companies looking for clever, personalised packaging ideas.
Any company that delivers goods is aware of one easy thing, which is: the right box is everything. Good packaging helps to protect goods, minimises returns, and creates trust, whether the company is a small online store or a giant e-commerce brand. Shipping boxes are not merely a container for UK sellers, but an element of a brand and a guarantee of service.
In this blog, we shall discuss all the information you need to know about boxes for shipping, such as types, sizes, couriers, and materials. It does not matter whether you are a small business owner or a developing retailer; this guide will help you choose the one that fits your products and budget the best.
Selecting the right cardboard shipping boxes will save money and provide safety to the products. Excessive boxes raise the courier expenses, whereas fragile boxes will be damaged. The right shipping box dimensions improve presentation, reduce waste, and keep customers happy. For UK companies sending items daily, selecting strong, eco-friendly custom shipping boxes uk also supports sustainability goals and meets courier standards like those set by Royal Mail and DPD.
A shipping box refers to a container created to cushion the protect goods in transit. These containers are used in retail and e-commerce to avoid crushing, moisture and impact-related damages. Corrugated cardboard shipping boxes are the most prevalent ones in the UK, and they shipping boxes have a high level of strength and flexibility.
They are also necessary to make deliveries safe and efficient, and they are frequently outlined in more detail in manuals such as Shipping Boxes for Secure Deliveries.

Small packages that are sent through mailer boxes are light, and they can accommodate small things like books, gifts or accessories. They are simple to compile and may even fall within the limits of the parcel size of Royal Mail.

Shipping cartons are larger and made from thicker cardboard. They’re designed for bulk orders, offering extra protection for heavier loads.
Rigid boxes are solid, high-end packaging options used for luxury items or presentation pieces. Though not always used for postage, they create a premium unboxing experience.
When selecting business shipping boxes, it’s vital to match courier standards. Each UK carrier has different limits:

Offers domestic and international delivery. Large shipping boxes should be under 30 kg for economy shipping.

Uses set parcel categories.

Takes packages with a weight of up to 30 kg and with a length + girth restriction.

Best with export shipments; size will influence the pricing levels.

Affordable to small ecommerce businesses.

FedEx is popular among businesses that are international and have proper weight and size limits.

These boxes use one fluted layer between two liners. They’re light, affordable, and great for standard goods. Many small businesses use them as postal shipping boxes.
Made with two fluted layers, they’re stronger and handle heavier or fragile products better. They’re among the best shipping boxes for small business use.
Built for industrial or bulk shipping, these boxes resist compression and moisture — ideal for warehouses or large export loads.
Stylish, custom-printed mailers are perfect for branding. Custom boxes shipping helps your parcels stand out in a crowded marketplace.
These are in accordance with Royal Mail Large Letter and Small Parcel categories, which ensure that you are not overcharged on postage.
Tailored to your products, custom shipping boxes reduce void space, improve presentation, and cut filler costs. You can even order small quantities when you buy shipping boxes in the UK.
Royal Mail determines pricing and delivery for parcel sizes. In the UK, Royal Mail establishes easy size and weight restrictions on various categories of parcels to enable businesses to make the correct choice of packaging. A letter must be succinct. A Large Letter works well for somewhat larger objects.
A Small Parcel is the next choice if your package is larger. The best choice for even larger items is a Medium Parcel. Always check courier-specific size and weight limits, as shipping boxes to UK standards may vary. When measuring, note the internal dimensions for product fit and external dimensions for courier pricing. For a closer look, visit our Standard Mailer Boxes Sizes and Dimensions guide.
Corrugated Cardboard Grades

Different grades determine box strength and purpose:
Kraft Paper vs Recycled Cardboard
Because virgin pulp is used to make the kraft paper, it has a smooth, organic look. Recycled cardboard is environmentally friendly and it is extensively used in the UK. The large shipping boxes are also combined with much strength and sustainability.
Inner protection is necessary for even the best box:
When buying shipping boxes in bulk or shipping boxes wholesale, these accessories come in handy.
Proper labelling guarantees seamless tracking and delivery.
With such precautions, the delays are avoided and the UK courier standards are achieved.

Branding transforms an ordinary box into a marketing tool. Your logo can be printed on custom shipping boxes or in the colours of your palette or with eco-friendly ink. Custom box shipping is regularly ordered by businesses during seasonal sales promotions or when new products are introduced to the market. The branded packaging enhances identity, and it enhances the unboxing experience.
Placing an Order for Custom Shipping Boxes in the UK
The Custom Boxes UK manufacturers, provide bulk and low-MOQ (minimal order quantity) chances, as well as the possibility to order boxes online and obtain the quotes to ship them in huge volumes and choose the size and type of flute and art.
In choosing shipping boxes, one should aim at balancing between price, safety, and brand name. Out of the postal shipping boxes that can be used to ship small-sized items and to large shipping boxes that can be used to ship large quantities of goods, all the options impact output and customer satisfaction.
Eco friendly packaging, appropriate shipping box size and clear labelling will not only keep your packages safe and intact but also in excellent condition. The Custom Boxes UK can be contacted at this moment to talk about the custom UK-made solutions that are appropriate in terms of representing your brand.
Royal Mail classifies letters, large letters, small parcels, and medium parcels based on weight and size restrictions.
Corrugated boxes with two or three walls offer the strength required for bulky or delicate objects.
It is also stronger and more protective than a single wall because it has two fluted layers.
After removing the tape and any plastic pieces, the majority of cardboard shipping boxes can be recycled completely.
To ensure proper fit and avoid incurring additional courier costs, measure the interior length, width, and height in centimeters.
To prevent items from moving around inside the box, use the paper filling and bubble wrap.
Yes, small and expanding businesses can place low-MOQ orders with The Custom Boxes.
Dimensional weight increases with larger dimensions, increasing the cost of shipping.
Kraft paper and recycled cardboard are eco-friendly, recyclable, and widely used in the UK.
Shipping boxes can be purchased directly from reliable UK vendors like The Custom Boxes UK.
Small parcels must not exceed 45 × 35 × 16 cm and weigh less than 2kg. With dimensions up to 61 × 46 × 47 cm and a weight limit of 20 kg, medium parcels offer you more space.