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Bed Size Facts: The Definitive Mattress Size Chart and Bed Dimensions Guide

Instinctively, the different sizes of beds seem simple enough to understand, right? But, the truth is, picking the right size of your mattress can be much more complex than you might infer. There are tons of things that you should take into consideration. For example, does it suit perfectly in your bedroom? Is there sufficient leg room? And many more.

Purchasing a too-small mattress can be one of the biggest mistakes anyone can ever make. So, to help you make the best decisions when choosing a mattress, below are the summary of the most common measurements you can see in a store and online. By reading this guide, you’ll get a clearer picture as to what mattress suits you and your bedroom.

Small Single or Cot Dimensions

This type of bed size dimension (30 x 75) is suitable for babies and toddlers. Small single or cot mattresses, created explicitly for cribs, can work well as toddler beds as well, once our child outgrows the cot.

Small single bed size is the perfect size when you are planning to save space in a small-space room. It is slim enough to suit into very narrow spaces but still gives a realistic sleeping surface for everyone, which is a cost-effective option both in space and budget.

This type of bed size is also ideal if you have visitors coming in unexpectedly. A single or cot mattress is perfect for bunk beds, daybeds, and small sleepouts.

Twin Bed Dimensions

A twin mattress is most probably the smallest possible bed size other than a small single or cot-size mattress. Twin mattresses bed dimensions are approximately (38x75) 38 inches wide by 75 inches long.

With this bed size, some adults might find it difficult to sleep in it since it is too short. As such, a  twin mattress is ideal for kids who have outgrown their toddler beds or cribs. And those who are very much ready for a larger mattress.

Moreover, twin mattresses are perfect for those people who sleep in narrow spaces or those who share a room with a roommate or with their sibling. This type of bed size is also an excellent choice for a daybed, guest bed, or bunk bed, most especially where space is at a real premium.

The advantage of having a twin bed compared to a larger toddler bed is that it provides more comfort and convenience into account. For sure, it is common that, once a person necessitates the Twin size, more high-quality materials are being used. Therefore, more engineering centered on giving comfort takes place. It is particularly true because as people age, the more they want to consider sleeping in a comfortable bed as a necessity.

Twin XL Dimensions

Twin XL mattresses are on the same width as a regular twin has, which is 38 inches. However, it features an additional 5 inches lengthwise, yielding to 80 inches all-in-all. Surprisingly, they are around the same height as a queen or king mattress.

So if you are an adult searching for a bed that saves tons of space but is a much more comfortable choice, then a Twin XL might be perfect for you. Even if it offers a few inches more in length, but the width remains the same as a regular twin. Meaning, it can be an excellent alternative for those people living in narrow spaces.

A Twin XL is also a common bed size in college dormitories and a great option for taller kids. The best thing about this type of bed is that you can use it in a king size bed frame. So if you’re in a romantic relationship, where your partner wants a different firmness than you, having a Twin XL mattress on a King size bed frame can be a great setup, especially if you opt for two Twin XL beds.

It is because two Twin XL beds can fit perfectly alongside with each other on a King size bed frame. This is certainly true, especially for couples who are sick of the firmness or the fluffiness of having just one mattress.

Full or Double Bed Dimensions

Full or sometimes referred as a double mattress, a full-size mattress is approximately 54 inches wide and 74 inches in length. As you can see, a full-size bed is 15 inches wider than a single or twin size bed. But, both full and twin sizes are approximately 74 inches in length, which might be too short for some people.

This type of bed size is ideal for people who require more space than what a Twin bed size can offer. However, if you’re in a relationship, a full-sized bed may not be the best option for you because the fit will be extremely tight.

On the other hand, if you pets (dog or cat) or if you have a kid who sleeps next to you, you might want to think of a wider option. A full sized bed can also be great in a children’s bedroom because it provides more comfort to sit down or lie down. It will also help you avoid buying another set of bed, once your child matures.

Full (Double) XL Dimensions

Though a Full (double) XL bed may not be a common bed size, it’s one that is very versatile. A Full (double) XL bed measures 54 inches in width by 80 inches in length, making it as long as a king or queen size can be. However, it is much narrower in shape, which means it’ll fit or work well in smaller rooms.

This bed size is the perfect option if you want to have more room for your legs but don’t need extra width. That makes Full (double) XL mattresses perfect for adults or adolescents who would want a spacious room to sleep in, but do not want to sacrifice or give up their valued space in their room.

One of the best advantages of having a full-size bed is that it can provide you the maximum comfort you need without consuming the whole space in your room. And even if it is not as thin as a regular twin, Full (double) XL mattresses can fit within most bedrooms comfortably. So you will have the essential amount of space to move in your room effortlessly.

Choosing the right size of your mattress is going to be determined by a few different factors such as the overall comfort not only of your sleeping solution but to the whole bedroom as well. So, if you have a smaller room, it is best to go with a Full (double) XL mattress to leave enough space for other necessary furniture as well.

Queen Bed Dimensions

The Queen mattress dimensions are 60 inches in width by 80 inches in length, which is 7 inches wider and 5 inches longer compared to a full-size mattress. These extra inches can make all the difference regarding its comfort-ability, most especially for couples.  And even for people who sleep with their kids or pets with them, a Queen bed may be perfect for you.

Anyone who sleeps in a Queen sized bed will have more space to move around and stretch out at night with the additional inches. However, with almost 30 inches of personal space, each person still has at least 8 inches less width compared if they sleep alone in a twin bed. As such, a Queen size bed is still ideal for single sleepers.

Even though an affordable price tag and the extra space might be enticing for most couples, sharing a Queen size bed with another person can give each sleeper only a single width of space, which is probably not that ideal.

And if you have a narrow space in your room, this type of bed is not the best option for you because it takes up too many spaces than the Full or Twin, and thus, the capability to openly move around the bedroom may become limited. But if you have a larger bedroom, then this will never be a problem for you.

Olympic Queen Dimensions

An Olympic Queen size bed is not just any standard bed size. It is 6 inches wider than the Queen, making it 66 inches wide by 80 inches long, which is not something that anyone can buy from any mattress store. This type of bed size is a much better option for those who do not need something super big but want something large enough for a couple sleeping.

It will give you, and your significant other the adequate sleep you both need, with 6 inches more than what a standard Queen bed does. So if you love to sit or lie spread out, an Olympic Queen bed will give you the opportunity to do so. It will also offer you lots of closeness to cuddle and snuggle if you are into such thing.

And as for space, if you have a small-space bedroom, this might not be the best mattress for you since it will not leave that much space for your furniture or even for moving around. But if you have more space in your room, then the added width will not be an issue at all. Surprisingly, the dimensions of this type of mattress can also help with the feng shui facet as well.

Moreover, the price of an Olympic Queen bed will not differ that much than that of a standard Queen bed. But depending on the manufacturer of the bed or the kind of bed frame you go with, that is what will determine how much money you will spend on this type of mattress. Don’t forget to check the dimensions of the bed frame as well.

King Bed Dimensions

The King-size bed dimensions are 76 inches in width by 80 inches long, making it 16 inches wider than a Queen-size bed. Keep in mind that it is best not to go with this mattress if your bedroom is less than the recommended size, which is at least 12x12.

It is probably the closest a couple can come since they can have a personal space as much as 38 inches than each would have on a twin bed. As a matter of fact, two twin extra-long beds placed together are about the equal size as a king-sized bed, which is a great option that can provide a flexible adjustment for a guest room. A King-size bed is the perfect size of mattress for your preferred sleeping position.

A king-size mattress is a perfect choice for couples who want to have the maximum personal sleeping space. To be able to ensure that the king-size mattress will suit nicely into your bedroom, determine your bedroom dimensions.

Furthermore, take into consideration on how you are going to place the mattress in your bedroom. Say, for example, taking the measurements of the entrance way, doors, and stairwells so that the mattress will fit through. Aside from that, your delivery service, if possible, might be able to give you tips on how to put your new king mattress into your bedroom.

California King Bed Dimensions

Popularly known on the West Coast, a California king mattress is approximately 72 inches wide by 84 inches long, which is 4 inches narrower and 4 inches longer than a regular king. It is ideal for, tall people, couples, active sleepers, and for those sleeping with their kids or pets. Similar to the King-sized bed, it’s recommended that you should have a large room of at least 12’x12’.

For a spacious bedroom or a large bedroom, a California king-sized bed can help you fill the space and give you tons of space to catch some sleep. But keep in mind to get bedding that matches the size of the mattress. Regular king mattress sheet sets and other type linens will not fit properly in this bed size. So, when measuring the size of your bed, don’t forget to get the size of a nightstand and whether you use one or two.

Wyoming King Bed Dimensions

Wyoming King Bed is a variety of a King size bed, which measures 84 inches wide by 84 inches long. This type of King-size bed is ideal for two
persons. But if you have a toddler or a pet sleeping with you, it’s not a problem at all.

Alaskan King Bed Dimensions

Of course, not all beds are all the same. You might think that there are only 4 sizes available, but you’re completely wrong. There’s a much
wider range of bed sizes in the market today. Today, the bed sizes are available in added sizes, just like the Alaskan King Bed. There are a variety of King size mattresses, and Alaskan King bed is just one of them. It is
about 108 inches wide by 108 inches long, which is big enough for almost four people. Alaskan King mattresses are probably the biggest bed size as of today.

So, you’ll need at least a three-piece box spring to go with this bed size. You can opt to share it with your kids and even with your pets. And because it’s heavy and big, flipping and cleaning it would require a group of people.

When selecting a mattress size that will fit your needs and your family as well, there are a couple of things to remember. First of all, be sure to know the accurate dimensions of your current bed. Of course, you would not want to go for a larger option and accidentally select the same type.

Second, if you are moving, keep in mind to measure the room that you will be sleeping in because it’s awful to get a mattress that’s too big for your bedroom. You will certainly have problems around the room if that’s the case, and your room will never be aesthetically pleasing to the eye.