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How To Know What Size Mattress I Have?

Ashton Roberts

December 25, 2023

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Identifying Your Mattress Size

The simplest way to determine the size of your mattress is to measure it. Grab a tape measure and measure the width, length, and depth of your mattress from edge to edge. Once you have these measurements, compare them to standard mattress sizes. Here they are for your convenience:

• Twin: 38″ x 75″ (approximately 96.5 x 190.5 cm)
• Twin XL: 38″ x 80″ (approximately 96.5 x 203 cm)
• Full/Double: 54″ x 75″ (approximately 137 x 190.5 cm)
• Queen: 60″ x 80″ (approximately 152.5 x 203 cm)
• King: 76″ x 80″ (approximately 193 x 203 cm)
• California King: 72″ x 84″ (approximately 183 x 213 cm)

If your mattress measurements correspond closely to one of these dimensions, you’ve found your mattress size. It’s good to note that there might be slight variations depending on the brand and whether the mattress has additional padding or pillow tops.

Step-by-Step Guide to Measuring Your Mattress

1. Prepare Your Measuring Tools

Make sure you have a reliable tape measure or measuring stick. If possible, get assistance from someone so you can ensure accuracy.

2. Strip the Mattress

Remove all bedding, including sheets, mattress protectors, pads, and toppers. This will give you the most accurate measurement of the mattress itself.

3. Measure the Width

Place one end of the tape measure at the left edge of the mattress and extend it to the right edge. Write down the measurement.

4. Measure the Length

Measure from the top edge of the mattress to the bottom edge in a straight line. Record this number as well.

5. Measure the Depth

Place the tape measure at the side of the mattress and extend it from the bottom where it rests on the bed base to the highest point on the top edge. If you have a pillow-top mattress, make sure to include the additional cushioning in your measurement.

6. Compare to Standard Sizes

Match your measurements to the closest standard mattress size. If your mattress is slightly off from these, it is likely due to the bedding manufacturer’s specifications or natural wear and tear.

Considerations When Identifying Your Mattress Size

While measuring your mattress is the most straightforward way to identify its size, there are some additional factors you should consider:

Brand-Specific Dimensions

Mattress manufacturers sometimes vary slightly in their sizing, with some offering ‘extended queen’ or ‘Olympic queen’ sizes, for instance. Check with the manufacturer if you can’t match your measurements exactly to the standard sizes.

Custom and Non-Standard Sizes

Beds that have been customized or mattresses made for specific purposes, like those for an RV, may not conform to the standard size dimensions. If you have a custom bed frame, you might also have a non-standard mattress.

Mattress Toppers and Pads

Some mattresses have integrated toppers or padding that can add a few inches to the overall dimensions. Ensure you measure to the deepest point if you can’t remove these layers.

Bed Frame or Box Spring Size

The size of the bed frame or box spring can also give you a clue to your mattress size, although you should not rely solely on this method, as frame sizes can vary.

Why the Correct Mattress Size Matters

Fitting Your Bed Frame

Knowing the exact size of your mattress is crucial if you’re buying a new bed frame, sheets, duvet covers, or a mattress topper. The wrong size mattress could leave you with a gap between the bed frame and the mattress or an overhang that can be uncomfortable.

Sleeping Comfort and Room Dynamics

The size of your mattress can impact your sleep quality and comfort, especially if you share the bed with a partner. Additionally, the mattress size needs to suit the room it’s in – for example, a king-size bed can overwhelm a small bedroom.

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When to Consider a New Mattress

If you’re experiencing sleep discomfort, your mattress size could be the issue. Other signs it’s time to consider a new mattress include:

• Visible mattress sagging or damage
• Waking up with stiffness or pain
• Noticing that hotels beds are more comfortable
• Your mattress is older than 7-10 years

When considering a new mattress, aside from size, think about the level of firmness, materials, and your sleeping position preferences.

Finishing Thoughts

In the quest for the perfect night’s sleep, starting with the size of your mattress is key. Whether you’re setting up a new bed or optimizing your current sleep situation, knowing that size does matter can lead to comfortable, restful slumber. A mattress that fits just right provides not only comfort but also foundational support for your bedroom design and functionality. When in doubt, take the time to measure your mattress; this small step can make a big difference in ensuring your sleep environment is perfectly suited to your needs.