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Knowledge Base

How to Measure Dimensions of a Box

Box dimensions are a critical part of any package as the dimensions of a box have an impact on what materials are needed to be used, the cost of production, shipping etc…

The three main dimensions by which boxes are measured include length, width, and depth.

Measurement of a box is easy and it can be done with basic mathematical knowledge.

The Three Dimensions of a Box

Length: Longest side of a box that contains a flap.

Width: The second longest side of a box with a flap.

Depth: The shortest dimension and only dimension that is not a part of the box’s flap.

In most square boxes, the length, width, and depth are likely to be nearly equal in measurement but all three of them will only be equal to each other in exceptional circumstances or if the manufacturer intended it to be the case.

A custom box with a tall box dimension.
Tall box dimension

In the case of a tall or upward-facing box, the depth will be the largest dimension while the length and width will be smaller.

A custom box with a long box dimension.

For long boxes, the length of the box will be far greater than the other dimensions of the box.

Ultimately, the product being packaged will determine what kind of box will have to be used. In order to calculate the total volume of a box, you will need to multiply the three dimensions of a box.

External Dimensions vs Internal Dimensions

Inner Dimension for Packaging

The measurements of boxes almost always correspond to the size of their inner dimensions.

This is important and makes it easier on customers because the content of a box is always guaranteed to be a tight fit if the box is measured by its internal dimensions.

If a box is measured by its external dimensions, it could prove to be problematic as external dimensions always factor in the thickness of a box.

The Issue of Outer Dimension

The contents of a particular box may not fit snugly if the box has been measured by external dimensions. This could feasibly damage particular products that need to be a tight fit with the box.

This is why calculating the measurement of a box via its internal dimensions removes any shred of doubt. This is especially important in the case of corrugated cardboard boxes.

Most manufacturers are very specific about the size of dimensions both internal and external and rightly so. After all, no one wants their products to get damaged because of incorrect measurements.

Any questions regarding custom packaging and how it can benefit you? You can always visit Pakfactory and speak to a packaging expert!

About author

Mark Velarga

Mark Velarga is PakFactory's Director of Digital & Content Marketing. He writes about all things related to design, business and technology and how it serves value to customers, business owners, packaging designers and industry experts. Connect with him on Linkedin.
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