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Shipping Box (FAQs)
Shipping Box (FAQs)

Corrugated boxes for sending heavier items.

Updated over a week ago


Internal dimensions are useful for working out what will fit inside your shipping box. We recommend adding a 5mm margin on either side of your product to find the correct internal size.

Custom sizing

Custom sizing allows you to create the right-sized packaging for your product. Right-sized packaging minimises the empty space around your product whilst not comprising its safety or your branding. This drives costs down, eliminates waste and reduces your carbon footprint. Right-sized packaging also creates a less frustrating customer experience. We always recommend custom sizing.

Standard MOQs apply for custom-sized shipping boxes.


Fluting is the wavy structure in the middle of corrugated board. It makes corrugated board strong and rigid, and provides cushioning for your product.


B-flute is the most widely used flute in e-commerce packaging. It has good cushioning and puncture resistance, and it's great for printing on. Although we can't guarantee a weight capacity, we recommend B-flute if you're sending anything up to 5kg.


EB flute combines E-flute and B-flute into a double-walled material. This means it's more durable and offers more protection than just B-flute. EB-flute is approximately 35% stronger than B-flute. But because it's two flutes combined, it costs more and uses more material. Although we can't guarantee a weight capacity, we recommend EB-flute if you're sending anything between 5kg and 10kg.


BC-flute is a common choice for shipping boxes. It combines B-flute and C-flute into a thick, double-walled material, creating great cushioning and stacking strength. BC-flute offers the most protection out of the options available. Although we can't guarantee a weight capacity, we recommend BC-flute if you’re sending anything 10kg and 15kg.


Brown kraft liner

Brown kraft liner is the most common material used for shipping boxes. It's cost-effective, and because it's unbleached, it's more sustainable than white kraft liner. As this kraft liner is brown, colours do appear less vibrant than on white kraft liner. Ideal for simple designs.

White kraft liner

White kraft liner is bleached, a process that uses chemicals to whiten natural wood pulp. This increases its carbon footprint, although only slightly. With a white surface, colours appear much brighter, which means it's better for colourful artwork and flood printing. We recommend white kraft liner if vibrant colour is essential for your design.

Brown testliner

Made from 100% recycled fibres, brown testliner is a cost-effective paper used on the inside of shipping boxes to reduce its carbon footprint.

Print Colours

All colours will be converted to the nearest Pantone colour. This will only affect your design if it’s made of CMYK colours.

If your colours need to be converted, we’ll always return your design after to review.


Handles make carrying shipping boxes easier and safer. This may be important for heavy shipping boxes, transporting boxes between multiple locations or if your box is very large.

As handles only alter the manufacturing process slightly, adding them has minimal impact on the cost and carbon footprint of your shipping box. Handles, however, do make the inside of your shipping box more susceptible to dust and moisture.

FSC label

An FSC label indicates the forest-based materials in a product are certified by the Forest Stewardship Council (FSC), a global, non-profit organisation dedicated to promoting responsible forestry.

Whilst there are three FSC labels, all of Sourceful’s FSC certified products are FSC Mix. This means the forest-based materials are from FSC certified forests, recycled paper and controlled wood. If you add the FSC Mix label, the correct files will be included with your dieline and artwork guidelines. You can download these later.

We always recommend including an FSC label so customers know your packaging is certified. If you don’t add an FSC label, your product will still be made with FSC certified materials but there won’t be a label on your packaging to tell customers. You can still market these materials as “from responsible sources”. Learn more

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