How to measure your mattress correctly: a practical guide to not making mistakes

Choosing the right mattress or replacing it requires a fundamental step: measuring it correctly. An inaccurate measurement can compromise the comfort, stability and aesthetics of the bed.

This guide will explain how to measure your mattress easily and accurately, considering all the essential aspects for a perfect choice.

Why is it important to measure the mattress?

Measuring your mattress correctly will help you avoid mistakes andmaximise your investment in a bed system.

Mattress measurement is crucial for several reasons:

Compatibility with the bed base: a mattress that is too large or too small in relation to the bed base will not provide optimal support.
Appropriate bedding choice: sheets and mattress covers must fit perfectly to ensure comfort and order.
Adaptability to the bed frame: mattresses that are not aligned with the frame may cause aesthetic or functional discomfort.

How to measure your mattress in 3 easy steps

Before you start, get:

A flexible tape measure .
Paper and pen to write down measurements.
A free space around the bed, to make it easier to note down the dimensions.

Then, follow these step-by-step directions to measure your mattress in 3 easy steps:

1. MEASURE THE LENGTH, i.e. the distance between the headboard and the bottom of the mattress.

Here’s how to proceed: lay the mattress on a flat surface and place the tape measure at the top end (near the headboard). Then slide the tape measure along the entire surface to the lower end. Finally, note down the measurement accurately, rounding only if necessary.

The standard length of mattresses generally varies between 190 cm and 200 cm, but some models can be longer, up to 210 cm, for those who are particularly tall.

2. MEASURE THE WIDTH, i.e. the distance between the two opposite sides of the mattress.

Instructions on how to measure: place the tape measure on one of the side edges of the mattress, extend the tape measure to the opposite side, keeping it straight. Finally, record the value.

The most common standard widths are as follows:

80-90 cm for a single mattress.
120 cm for a single mattress.
160-180 cm for a double.

If your mattress has a non-standard shape or size(e.g. for a round or king-size bed), make sure you record it accurately.

3. MEASURE THE THICKNESS, essential for assessing comfort and compatibility with the bed base and bed linen.

Here’s how to measure it: place the tape measure on the side of the mattress, starting from the bottom base and take the tape measure to the top, measuring the distance vertically. Then write down the measurement, also considering any additional padding.

The thickness can vary between 15 cm and 30 cm or more, depending on the model. Memory foam mattresses with pocketed springs tend to be taller than conventional ones.

Other aspects to consider when measuring your mattress

We want to leave you with other important tips for measuring your mattress accurately and correctly. In addition to the fundamental points we have discussed, it is also good to consider other elements, such as:

SHAPE OF THE MATTRESS

Yes: not all mattresses are rectangular!

If your mattress has a special shape, such as a circle or rounded corners, follow these tips:

For round mattresses, measure the diameter (the distance between two opposite points through the centre).
For irregular shapes, measure the longest and widest points to identify the maximum dimensions.

OVERLAYS OR ADDITIONAL LAYERS

Some mattresses include integrated toppers or extra layers that increase the overall height. Always measure considering the entire structure to avoid problems with sheets or mattress toppers.

MANUFACTURING TOLERANCES

Please note that mattresses can have manufacturing tolerances of up to 1-2 cm. We advise you to check the manufacturer’s specifications for accuracy.

MEASURING FOR NEW MATTRESSES

If you are buying a new mattress for an existing structure, also measure:

The bed frame: check the width, length and spaces between the slats.
The bed frame: make sure the chosen mattress fits the frame perfectly, especially for beds with raised edges or storage units.

Tips to avoid common mistakes in mattress measurement

Finally, to conclude our guide to the perfect mattress measurement, let’s consider the most common mistakes and how to avoid them:

Do not measure a deformed mattress: remove sheets and accessories to get an accurate measurement.
Avoid using rigid rulers: a flexible tape measure better follows the curves and padding of the mattress.
Do not estimate by eye: even small differences can affect compatibility.
Check several times: check your measurements to make sure you have not made any mistakes.

Measuring your mattress correctly is an essential step to ensure comfort, compatibility and durability. By following this guide, you will be able to accurately measure the length, width and thickness, ensuring that the mattress you choose fits your needs perfectly.

Whether you are replacing an old mattress or buying a new one, you now have all the information you need to make sure you don’t make mistakes. And remember: a mattress of the right size is the first step towards a truly rejuvenating sleep!

Do you need our help? We are at your disposal for non-binding advice!