Enter any dimension below and we will automatically calculate the conversions.
Box dimensions refer to the internal (usable) dimensions and are always measured in the same order.
1. Longest opening dimension (length)
2. Shortest opening dimension (width)
3. Depth (height)
Depending on the board grade and flute, the internal and external dimensions of a box can differ significantly. Watch our ‘how to measure a box’ video to find out more.
Corrugated cartons differ in strength depending on the combination of fluting, and weight of paper used, to create a solid board. A single wall box has one layer of fluting, and a double wall box has two (giving extra strength, better suited to heavier items).
Many of our boxes have a ‘multi-score’ feature, giving you the option to vary the depth of the box to a pre-scored dimension. Simply cut the existing slots (between the flaps), fold along the pre-scored crease, and you create a shallower depth carton.
Compare our most popular types of boxes in the table below:
Use the grid below to see the range of sizes we offer in our cardboard boxes range, and the types of boxes that are available in each variant:
We sell various types of boxes, from standard duty single wall to extra heavy duty.
Single wall boxes are identified by the prefix ‘CSW’.
Heavy duty Enviro-boxes have a clear ‘Enviro’ print on one of the flaps.
Double wall boxes have a code starting ‘CDW’.
As you can see, our single wall boxes have a single layer of corrugated board. They are our best value option for packing lightweight goods.
Enviro-boxes are made from a thicker and more rigid single wall board. These are suitable for slightly heavier goods.
Double wall boxes have 2 layers of corrugated board, making them our strongest general-use boxes. They can be used to pack heavy items such as books.
We also sell extra heavy boxes, suitable for very heavy items such as engineering components.
Step 1: How big is your product?
Standard box dimensions are given in the order Length x Width x Height.
Measure the length with a tape measure. Next, measure the width. Measure the height / depth.
Step 2: Select a box that is slightly larger in all 3 dimensions. This will allow for extra padding to protect your product.
You will need the INTERNAL dimensions of the box.
Depending on the board grade, this could be up to 10mm less than the external dimensions.
To check that your box is the correct size, measure the length, width and height on the INSIDE of the box.
All dimensions provided for our boxes are internal.
Step 3: Wrap your product in a suitable padding material and place inside the box.
It should be a snug fit to prevent movement.
Step 4: Close the box and seal with tape or strapping as required.
Consider our custom logo printed tape for a cheap branded sealing option.