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How to Measure a Box Dimension?

Accurately determining box dimensions is key for custom packaging, playing a pivotal role in ensuring product safety. While measuring a box may seem simple, it demands meticulous attention when customizing packaging.

The dimensions of a box are crucial, influencing required materials, production costs, and expenses related to shipping and storage.

Consider this: limiting the internal movement within a box minimizes potential damage, thereby reducing overall costs. Precise measurement is, therefore, vital.

To assist in this process, we offer a comprehensive guide. It includes detailed steps for measuring box dimensions, calculating box volume, and an important tip to ensure precise measurements.

how to measure box size -jml packaging box


The Three Dimensions of the Box

To create the perfect packaging, it’s important to know how to measure a box accurately.

While this may seem like simple math, it requires some care.

So, what are the dimensions you need to measure exactly?

The three primary dimensions of a box are length, width, and depth.

To begin, focus on the top opening of the box and measure the following:

  • Length: The longest side of the box when viewed from the top.
  • Width: The shorter side of the box when viewed from the top.
  • Depth (Height): The side perpendicular to the length and width.

If the box is tall or upward-facing, the depth will be the largest dimension, while the length and width will be smaller.

measure box size-jml

Although square boxes should have equal sides in theory, this is less likely to be the case with packaging.

Therefore, it’s essential to measure each dimension carefully to ensure your packaging is adequate for your products.

For long boxes, such as the one illustrated below, the depth and width will be much smaller than the length.

corrugated box-jml

The type of box you choose will depend on the size and shape of your product.

Nonetheless, the length, width, and depth are essential measurements for producing any box.

The Importance of Internal Dimensions for Custom Packaging

When it comes to boxing dimensions, the industry standard is based on internal measurements.

Understanding the difference between internal and external dimensions is crucial for obtaining packaging that fits your products precisely.

Internal dimensions are more accurate for both the manufacturer and your product’s protection.

Most manufacturers are particular about both the internal and external dimensions, and for a good reason.

After all, no one wants their products to get damaged due to inaccurate measurements.

Although it may seem simpler to measure the external dimensions of a box, the internal dimensions are what matters most for your custom packaging project.

This ensures that your product fits snugly inside the box, and you can customize the dimensions to ensure that your product is secure.

Keeping minimal room for movement inside the box guarantees the safety of your products during shipping and handling, allowing your business to offer high-quality products every time.

The Challenge with External Dimensions for Custom Packaging

Relying on external dimensions to measure a box can lead to problems because they do not account for the thickness of the box, resulting in packaging that may not fit correctly.

This can potentially damage certain products that require a tight fit.

That’s why calculating a box’s measurements using its internal dimensions eliminates any uncertainty.

This is especially vital for corrugated boxes.

Corrugated boxes have a fluted texture sandwiched between two paperboards, which makes the material thicker and adds a few millimeters to every measurement taken from the outer surface of the box.

Therefore, internal dimensions will provide more precise measurements, making it easier to determine the box size needed to package your products.

Calculating the Volume of a box

To calculate the volume of a box, you can use the following formula:

“Length x Width x Depth = Volume”.

This calculation is crucial in determining your shipping, warehousing, and distribution processes.

Additionally, it helps you evaluate how well your product fits into your preferred packaging, which is essential for optimizing material and cost and structural engineering of your packaging.

Skipping over this step can be detrimental to your business.

After obtaining the basic dimensions, multiply them to get a volume measurement, which will be in cm cubed.

how to measure box size

Are you not confident in your math skills?

Don’t worries! You can easily obtain precise volume measurements for your packaging with this practical calculator.

With this knowledge, you can accurately determine the dimensions of your box and use them for any packaging project you require.

For further assistance with your custom packaging needs, reach out to JML Packaging and consult with one of their packaging specialists to learn how it can enhance your business.


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