Standard Mattress Sizes — Choosing the Best Mattress Size and Dimensions for Your Lifestyle

Standard mattress sizes cover everything from the tiny crib mattress to the California King Size mattress, the largest commercially available mattress.

Here are the standard mattress sizes (width X length).

Single or Twin Size: 38 X 75
Extra Long Twin Size: 38 X 80
Double or Full Size: 53 X 75
Extra Long Full Size: 53 X 80
Queen Size: 60 X 80
King Size: 76 X 80
California King Size: 72 X 84

Why taking accurate mattress measurements is difficult.

While the measurements above are reasonably accurate, you will find some differences if you measure your own beds. For one thing, mattress manufacturers are allowed a slight tolerance, which means the finished size can be a bit more or less by about 1/2 inch.

You may also find other “standard mattress size” charts with slightly different measurements. Some may add an inch in width or subtract an inch in length.

But when you consider that mattresses are very soft, bulky, bulging things, the standard sizes can never be 100 percent accurate. To get your own mattress size, measure from seam to seam on the topmost covering. I’m sure you will see variations.

Don’t forget to measure the bed frame!

If you are planning on getting a different mattress size from what you have now, you will also be buying a new bed frame to go with it.

If you are measuring to see how it will fit into your existing bedroom, don’t forget to take the dimensions of the bed frame into consideration as well.

Standard Mattress Sizes and Mattress Thickness

Although mattress length and width are standard, mattress thickness is something else altogether. A mattress could vary in thickness from a 4-inch foam slab to a whopping 22-inch deluxe pillowtop innerspring.

So if you plan to choose a new mattress size, don’t forget to allow for mattress thickness when deciding how much space it will require.

Some bed frames are not designed to accommodate a super-thick mattress. If you are on a budget, remember to factor in the possibility of buying a new frame to support your new mattress.

Bed linens have become bigger to accommodate thicker mattresses, but your old ones might not fit. Remember that any mattress toppers you add will also make your existing mattress thicker and harder to fit your old sheets on.

You can always buy flat sheets one size bigger than your mattress (for example, queen size for a full sized mattress) and wrap them around the bottom like they do for hotel beds… at least until you save up for new jumbo fitted sheets!

If you choose a thick mattress, you may want to pair it with a thinner foundation – so you won’t need a ladder to climb into bed! Foundations range greatly in height but you can get one as thin as 4 inches, and it still does the job fine.

If you’re thinking of stepping up to a king size mattress size, click here…

If you’re wondering if you should stay with your queen size mattress size, read this…

Are you a single sleeper? Need a better bed at a reasonable price? There are good reasons to reconsider a twin mattress size, even if you’re way past bunk bed age…

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