mattress size chart

Mattress Dimensions: What size mattress should I choose?

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We get mattress size questions all the time from readers. Picking the best mattress for your bedroom is an important decision. There’s nothing worse than getting a new queen size memory foam mattress and then spending the next 10 years wishing you had a king size mattress instead. There are multiple factors in addition to the size of your bedroom that need to be taken into consideration when looking at mattress sizes. If you sleep with a bed partner and have the space, a king size mattress would most likely be a better choice to give everyone enough space. If you live in the city and have a tiny bedroom, a king size mattress will take up the entire living space of the room and is more complex to transport when you move. Picking the right size mattress will impact your quality of sleep so make sure to read more about each size and make the best decision for your personal living situation.

California King Mattress Dimensions 

A California king mattress is best in a larger bedroom since the mattress is one of the largest mattresses on the market. The king vs California king mattress preference comes down to the individual. If you are looking for extra space or have kids or pets (or both) sleeping in bed with you at night, the extra inches can make a big difference if your bedroom has space. A California king mattress sizes are 72 inches wide and 84 inches long. Split California King Mattresses are 36 inches wide (multiplied by each side so 72 inches wide total) and 84 inches long. If you are curious about a split head California king mattress dimensions, split head California king dimensions are 72 inches wide and 84 inches long.

California King Purple Mattress

King Size Mattress Dimensions

King size mattresses are popular with couples. King size mattress provide enough mattress surface space for 2 people to comfortably sleep without touching. If your bedroom has the space for a king mattress, it will be dramatically more comfortable than a queen size mattress if you sleep with a bed partner. Poor sleep quality, heat retention, and motion transfer are common complaints amongst couples who sleep on the wrong size mattress. King size mattress dimensions are 72 inches wide and 80 inches long. If you are interested in a split king mattress, the mattress length is still the same as a standard king mattress except the splits are 38 inches for each side. Split head king mattresses sizes are also the same as a standard king at 72×80 with 34 inch length splits from the top. Split king mattresses are used with adjustable bed frames so if you have a traditional king platform bed, the standard king size dimensions are all that matter.

Charles P Rogers Mattress

Queen Size Mattress Dimensions

If you sleep with a bed partner, a queen size mattress is the most common for couples. Mattress sizes smaller than queen will not be comfortable for multiple people. Queen size mattress dimensions are 60 inches wide and 80 inches long. XL queen mattresses exist and they are 84 inches long instead of the standard queen length of 80 inches. Split queen mattress dimensions are half of the standard queen with each split measuring 30 inches wide and 80 inches long. If you are looking for the best mattress for couples, queen or king size mattresses are recommended.

Full Size Mattress Dimensions

Full size mattress sizes are 54 inches wide and 75 inches long. A full mattress is the perfect size for kids or single adults. More than one person sleeping on a full size mattress would be uncomfortable. Multiple children could sleep on a full mattress without discomfort but as the children age, a full mattress is not large enough to sleep comfortably. Double mattresses are less common these days and are not as popular as queen size mattresses. When comparing a queen mattress vs full mattress, the queen is an extra 6 inches wide and that makes a big difference in sleep space with multiple people in one bed.

Twin Size Mattress Dimensions

A twin size mattress is best for children or guest beds. Twin size mattress dimensions are 39 inches wide by 75 inches long. Since twin mattress sizes will vary occasionally by manufacturers, you should measure your exact mattress if you need accurate sizes. Some twin size mattresses are listed as 38 inches wide by 75 inches long so some manufacturers are not consistent with the standard mattress size chart. Twin XL mattress dimensions add 5 inches to the length of a twin size mattress. A twin XL mattress size is 39 inches wide by 80 inches long. Twin XL mattresses will need sheets that specifically confirm that they are for the twin XL mattress size or they will not fit.

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What size mattress do I have?

If you don’t know what mattress size is in your bedroom, measure the length and width and match it up with our mattress size chart. One key factor to remember is how thick your mattress is. If you have a pillow top mattress, deep fitted sheets will fit your mattress more snug, and not pop off during the night. The final decision on the mattress size best for your home is a personal decision. If space is no issue, upgrading to larger mattress size is a game changer. Couples often rave about how much better their marriage is after they upgrade from a queen size mattress to a king size mattress. Replacing a worn out mattress that’s no longer providing support will transform your sleep and overall well being. When you make the leap, evaluate your current mattress size and weigh your options. Life has most likely changed quite a bit since you bought your mattress, make sure your mattress size reflects those changes for the best sleep possible night after night.

Mattress Size FAQ

Still have questions? The FAQ section below seeks to answer the most common questions we have received about mattresses.

Can two people sleep comfortably in a full size bed?

It is not uncommon for a couple to share a full-size mattress. However, whether two people can fit comfortably on a full-size mattress may depend on the size of each individual and/or their personal sleep needs. To give you some perspective, each person will have around 27 inches of space when sharing a full bed.

What’s the difference between a full size mattress and a double mattress?

In the mattress world, the terms “full” and “double” are often used interchangeably. “Double” is a slightly older term that is not as commonly used. It’s worth noting that a full and double are both shorter than a queen; you may want to take height into consideration when deciding between a full or queen.

What’s the difference between a twin size mattress and a single bed?

Much like single and double, a “twin” and a “single” are terms used interchangeably in the mattress industry, with “single” being the slightly older term.

Can you get a custom sized mattress made just for you?

The most common sizes, “king”, “queen”, “full”, and “twin” are not the only mattresses available for purchase. Many companies will make a custom mattress upon request. For example, some manufacturers will special-design an extremely tall mattress or a mattress that is larger than a California king.

Are there different sized mattresses for RVs and campers?

Because recreational vehicles (RVs) typically feature a smaller space for sleeping, RV mattresses usually have a smaller size and lower profile. If you are searching for an RV mattress, you generally have the option to purchase a mattress that has been specially designed for an RV or a low-profile, small-size bed.

Are there any sizes larger than a California King mattress?

Mattresses larger than the California King size mattress do exist, and are sometimes referred to as Alaska King, Texas King, or Wyoming King beds. The Alaska King Mattress dimensions are 9’ by 9’, while the Wyoming King dimensions are 7’ by 7’. By comparison, California King mattress dimensions are 72” x 84”.

What’s the most popular mattress size?

Queen size mattresses are the most popular mattresses. A queen size mattress will comfortably sleep 2 adults and fit in smaller bedrooms.

Do I need sheets and a comforter that are the same size as my bed?

The short answer is yes. Particularly when it comes to fitted sheets, it is important to purchase sheets that are not only the correct size, but have the correct depth or height.The general rule of thumb is that you need a fitted sheet depth that is at least two inches deeper than the height of your mattress.

On the other hand, if you choose a mattress comforter or duvet that is slightly too large for your bed, it’s often less of a problem — the ends of the bedding may simply hang off the sides of the mattress.

Are there different sized pillows as well?

Pillow size may come into play depending on the size of your mattress. The smallest and most common sized pillows, standard (20W” x 26L”), tend to be sufficient for twin and full-size mattresses. However, people who toss and turn frequently during the night may opt for a larger pillow — such as the super standard (20W” x 28L”), queen (20W” x 30L”), or king (20-21W” x 36-41?L). You may also consider a body pillow (dimensions vary; generally between 48W” x 20L” or  54W” x 24L”), ideal for side sleepers, pregnant women, and those who enjoy snuggling with their pillow.

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