How to Measure A Box

How to Measure A Box

It is important to understand how to specify the dimensions required to package your products securely. 

For example a 400 x 300 x 250mm box has a very different configuration to a box which is 300 x 250 x 400mm in size.


Internal vs External Dimensions

The measurements of a cardboard box always refer to the internal dimensions of the carton (the usable space), not the external dimensions. This is done to ensure a snug and protective fit around your product.

Depending on the grade and fluting of the cardboard, the internal and external dimensions of a box can differ significantly, in some cases even 10mm.

Always measure the internal dimensions of your box, score to score, and order your cartons using the internal dimensions.

Remember to leave space for any extra padding, such as bubble wrap to cushion the item. Generally, you should add at least 5mm to each dimension.


Length x Width x Depth

Standard box dimensions are given in the order Length x Width x Height. Make sure to give the dimensions in this order.

Many styles cannot be configured with Width x Length x Height. CCP will change the configuration of your dimensions if you place your order in the incorrect configuration.

  • Length: is always the longest horizontal measurement or longest opening dimension (unless the box is square i.e length and width are equal). Length is often perceived as the "front of the box" and "side to side"
  • Width: is the shortest opening dimension, and perceived as "front to back"
  • Height (sometimes referred to as the "depth”): is the vertical dimension of the box when the opening is facing upwards. It always measures distance between "top and bottom"


Want to learn more?

  • Learn about Styles
    Learn about Styles
  • How to Measure
    How to Measure
  • Print Specifications
    Print Specifications
  • Custom Boxes
    Custom Boxes
  • Manufacturing Process
    Manufacturing Process
  • How to find the perfect box
    How to find the perfect box
  • What is Corrugated Cardboard
    What is Corrugated Cardboard

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