Choosing the proper bed size is a critical step in the mattress purchasing process. When it’s time to replace your mattress, it’s common for many sleepers to continue with the same size as previously, but things change—sleepers evolve.
Are you a light sleeper? Do you share your bed with any pets or children? Do you have a companion? You should also examine whether your mattress size should vary if the size of your bedroom changes. These are just a few of the easy questions you should ask yourself while deciding on the best mattress size for you.
This guide deconstructs each mattress and bed size dimensions and characteristics to provide you with all the information you need to choose which is the greatest match for you and your space. Once you’ve determined your size, take our mattress quiz to get a better sense of the best mattresses for your sleeping habits.
1. Bed size dimensions
You’re a single university student? Couple with a furry child? A four-person family? Whatever stage of life you’re in, you need a bed that reflects that.
Choose the correct size bed for you right now; our bed sizes guide is a great place to start.
1.1 Twin size bed dimensions
A Twin mattress is approximately 38″ wide by 75″ long. The smallest of the adult-size mattresses. A Twin size mattress is appropriate for a youngster who has outgrown his or her toddler bed, a single adult, or people with modest bedrooms.
This size is typical for daybeds, bunk beds, dorm quarters, and tiny guest bedrooms.
This is also the smallest mattress available from the majority of the leading internet mattress retailers. A Twin size mattress may give the same luxurious feel as a bigger mattress without costing as much or taking up as much space for sleepers on a budget or with limited space.
1.2 Twin XL size bed dimensions
A Twin XL mattress is 38″ W x 80″ L. This mattress has the same width as a standard twin mattress but is 5″ longer in length. This is ideal for tall folks who do not have enough space for a larger bed.
Not all sheets or comforters are available in Twin XL, so double-check and understand the distinction before purchasing for bedding. Learn more about the differences between Twin and Twin XL mattresses in our mattress comparison guide.
Can two Twin XL mattresses be used on a King size frame?
The quick answer is yes. The dimensions of one King size mattress are equal to two Twin XL mattresses. This is a common method for sleeping couples with extremely diverse firmness or feel preferences. For sleepers who wish to utilize an adjustable frame, joining two mattresses on a single frame is also a good alternative.
Sleepers may sit up or lie back without disturbing their companion thanks to the separate mattresses. If you want to utilize two Twin XL mattresses on a King frame, you may use either individual Twin XL bedding sets or a single King size sheet set.
1.3 Full size bed dimensions
A full-size mattress is 54″W x 75″L. This size mattress is sometimes known as a “regular double.” A Full size mattress may be appropriate for solitary active sleepers who want to spread out or couples with a compact bedroom.
For couples who share a bed with children or pets, a full or double size mattress may be too small. See my complete list of the finest full mattresses.
When shopping for a Full-size mattress, consider the following specifications:
- That is 54″ of sleeping area for a single sleeper.
- That equates to 27″ of sleeping area per person (11″ less than a Twin size mattress) for couples.
- A 6′ tall sleeper would have only 3″ of extra space on this mattress if completely stretched.
1.4 Queen size bed dimensions
A Queen mattress is 60″W x 80″L. This is the most common mattress size in the United States right now, and it’s a good match for single active sleepers, couples, and those who share a bed with children or pets.
It is advised that your bedroom be at least 10’L x 10’W in order to properly fit a Queen mattress.
Consider the following specifications:
- That is 60″ of sleeping area for a single sleeper.
- That equates to 30″ of sleeping area per person (eight inches less than a Twin size mattress).
- A 6′ tall sleeper would have 8″ of extra space on this mattress if completely stretched.
1.5 King size bed dimensions
The dimensions of a King size mattress are 76″W x 80″L. This mattress is ideal for both solitary active sleepers and couples who share a bed with children or pets. It is advised that your bedroom be at least 12’W × 12’W in order to properly fit a King size mattress.
A King size mattress is the same size as two Twin XL mattresses for comparative purposes.
If you and your spouse share a bed but have very different sleeping habits, the Split King might be a good alternative since it allows each side of the bed to have a separate feel. Split King mattresses are also excellent options for sleepers contemplating adjustable bed frames.
Before choosing a King size mattress, consider the following specifications:
- It has 76″ of sleeping area for solitary sleepers.
- It is 38″ of sleeping space per person for partners (the same width as a Twin size mattress).
- On this mattress, a 6′ tall sleeper would have 8″ of extra area if completely stretched (the same length as a Queen size mattress).
1.6 Split King size bed dimensions
A Split King size mattress is made up of two identical mattresses, each 38″W x 80″L, to match the dimensions of a full King size mattress.
Sleepers who benefit from a Split King bed frequently have extremely different sleeping habits than their spouse. The split mattress allows sleepers to have a mattress that is just ideal for them without jeopardizing their partner’s sleep.
Some Split King beds are linked at the bottom and only split at the top. Because the inside of the mattress stays the same throughout, this type is more suited to sleepers who do not have varying sleep preferences.
Some couples may choose a flippable mattress with varying hardness on either side, such as the Layla mattress.
When placed on an adjustable frame, this type of mattress has the advantage of allowing each side of the mattress to move separately, allowing sleepers to sit up or lie back without disturbing their spouse.
The obvious disadvantage here is the difficulty in locating sheets that match this sort of mattress. These sheets are often quite pricey and may be difficult to locate.
1.7 California King size bed dimensions
A California King mattress is 72″W x 84″L. This mattress is ideal for taller sleepers or those who just like a longer mattress. It is ideal for active sleepers or couples who may share a bed with children or pets.
While the California King mattress is 4″ larger in length, it is 4″ thinner than a conventional King mattress. It is advised that your bedroom be at least 12’W x 12’L to properly fit a California King size mattress.
These specifications imply:
- That is 72″ of sleeping area for a single sleeper.
- That equates to 36″ of sleeping area per person (two inches less than a Twin size mattress).
- A 6′ tall sleeper would have 12″ of extra space on this mattress if completely stretched.
2. What mattress size do you require?
When determining which mattress is the best match for you and your area, keep the following points in mind:
2.1 What is the size of your living space?
Your room should be at least 10’x10′ to accommodate a Queen size bed. The scaled photos below might help you see the footprint of a Queen size bed / mattress in both a 1010′ and a 1212′ bedroom.
Your room should be at least 12’x12′ to accommodate a King or California King size bed. The two photos below will show you how huge a King size mattress / bed is in comparison to a 1010′ room and a 1212′ room.
2.2 Who is going to sleep in the bed?
- Children
Depending on their age, children will most likely be most comfortable in the following mattresses: Twin, Twin XL, and Full beds are available.
- Single adults
Single adults will most likely be most at ease in the following mattress sizes: Twin XL, Full, Queen, and King sizes are available.
- Beds with two adult sleepers
Beds with two adult sleepers are most likely to be most comfortable with the following mattress sizes: Queen, King, California King
- Beds with two adult sleepers or pets
Beds with two adult sleepers as well as children or pets would most likely be most comfortable with the following mattress sizes: King, California King.
- Sleepers who want an adjustable mattress
Sleepers looking for a mattress that will operate with an adjustable frame (allowing each side to move separately) should consider the following mattress sizes: Twin XL mattresses, Split King
3. Top best mattresses with diversified bed sizes
3.1 California King Mattress Size
The California king mattress size is 72″ broad and 84″ long, making it somewhat longer and narrower than a standard king mattress. A California king mattress is ideal for taller couples that want more space at the foot of the bed than a queen or king mattress.
Check out our large range of California king bed and mattress options, including some on sale. These mattresses were created in the 1960s to appeal to professional sportsmen and celebrities.
- Avocado Green
Aside from being extremely comfortable, especially for back, stomach, and heavy sleepers, this Cal king mattress is also environmentally friendly — Avocado mattresses are created from organic wool, cotton, and natural latex.
Avocado obtains its wool from its own co-owned Indian wool farm, where over 200,000 sheep range freely across 40 organic hectares, in addition to employing organic ingredients. If you want a vegan mattress without any form of wool, Avocado also manufactures the same mattress in a vegan version, which is also available in a California king size.
In addition, the firm grows and manufactures its own organic Dunlop latex. Each mattress is manufactured at the company’s California facility, where harmful glues are avoided by using a traditional hand-tufting process. As if that weren’t enough, all of their mattresses are evaluated for minimal emissions, ensuring that they fulfill air quality regulations.
The Avocado Green in California king size is an excellent choice if you want a somewhat longer medium-firm mattress to support a bigger or taller body. It’s also a good firmer mattress for back and stomach sleepers, as well as people who suffer from back discomfort. A little more lengthwise space offers the mending body plenty of room to work.
- Amerisleep AS2 Hybrid
The AS2 Hybrid mattress from Amerisleep has a patented memory foam called Bio-Pur, which is very sensitive and quick to recover anytime a sleeper moves, offering some motion isolation.
It has a medium-firm density and is quite supporting, so it reduces pressure and aids with spinal alignment. The California king AS2 Hybrid is a good choice for taller people or couples who suffer from back problems.
In comparison to more typical variants, Bio-Pur foam is extremely well vented and breathable, keeping sleepers cool throughout the night.
In addition, an eight-inch layer of coils and a layer of HIVE technology (hundreds of hexagonal cuts scattered over five zones) provide optimal support and cushioning where your body requires it.
The AS2 Hybrid California king mattress is ideal for all sorts of sleepers, especially those who move about and switch sleeping positions frequently during the night. Furthermore, it is CNET’s recommendation for the best mattress for couples, and the California king bed provides additional leg room.
3.2 King Mattress Size
A king size mattress, measuring 76″ broad by 80″ long, gives plenty of space for a couple to sleep comfortably.
Because not every bedroom can accommodate a king mattress, make sure to measure to ensure that the king mattress size is not too large for your sleeping area before settling on one of the various king bed mattress alternatives available. The king mattress size was introduced by Simmons for the first time.
- Nectar Premier
The Nectar Premier mattress is the successor for the Nectar Lush, the mattress company’s top-tier product. The Nectar Premier mattress is made of thick memory foam, which provides a soothing and slow-responding memory foam experience.
Your body takes a few seconds to activate the foam, but once it does, the memory foam progressively moulds around your curves and nestles you into the bed.
It’s also totally comprised of foam, so it lacks the bouncy and responsive sensation that hybrid beds may offer. Unlike traditional memory foam beds, which are known for storing heat, the bed’s gel memory foam comfort layer has a phase-change ingredient that helps maintain body temperature neutral.
You may also check at the Nectar Premier Copper model for even more cooling power.
- Leesa Legend
The Leesa Legend was developed for all sleeping positions, but this king mattress is especially well-suited for side sleepers. The hardness level of the mattress is rated as medium to medium-soft, and it felt fluffy enough to satisfy most soft mattress aficionados.
Memory foam might be too stiff for some purchasers, but they sunk into the Leesa Legend in all the right places. It also supplied the proper combination of body shape and support for good spinal alignment without sinking since it includes two layers of springs in addition to two layers of memory foam. It featured superb edge-to-edge support and low motion transmission, just like the Nectar Lush.
The cover made of 100% organic cotton and Merino wool was also a great touch. This king-size mattress not only feels soft and welcoming, but it’s also engineered to drain away moisture, keeping you cool and dry as you sleep. It’s also constructed from recycled water bottles, which is quite awesome.
3.3 Queen mattress
The queen mattress, at 60″ broad and 80″ long, is a wonderful mattress for couples who prefer sleeping close together, with two individuals fitting better inside the queen mattress size than on a full bed.
A queen bed mattress is also suitable for a single individual who requires additional sleeping space. Explore the available queen size mattress options, including some amazing offers on sale mattresses.
- Zinus Memory Foam 12-Inch Green Tea Mattress
Memory foam mattresses have taken the Internet by storm because they provide great value, quick shipment, and comfort. According to tens of thousands of excellent internet reviews, the Zinus Memory Foam 12-inch Green Tea Queen Mattress is the best in terms of comfort and affordability.
Unlike some other queen memory foam mattresses, this Zinus model has good edge support, according to users—even better than coil mattresses.
This means you may roll to the edge of the mattress without fear of ending up on the floor, or sit on the side of the bed to put your shoes on without fear of slipping off. Users also remark that the mattress does not retain heat or appear to develop droopy places, which is a common complaint about memory foam mattresses.
CertiPur-certified for durability, performance, and content, the Zinus Memory Foam 12-inch Green Tea Queen Mattress. A few customers complain about an odor after unpacking, but the majority of users find the mattress to be ready to use within a day or two.
- Casper Sleep Foam Mattress 2018 Edition
Casper Sleep has been producing luxury memory foam mattresses that have received praise for their gentle support, but they are a little more expensive. If you want to spend a lot of money on a queen-size mattress, Casper’s famous memory foam choice is one alternative.
This memory foam mattress is made up of three layers of foam for optimal support and sleeping. The open cell latex foam on top, which is both hypoallergenic and breathable, distinguishes this mattress from many other memory foam mattresses on the market.
While side sleepers may not like the firm support of this mattress, many other individuals appreciate the total support it provides and describe it as floating.
However, there have been issues concerning the mattress’s lifespan. Some customers complain about a lack of support or dips in the memory foam after a few years.
If you’re ready to spend a premium on a queen mattress in exchange for a few years of cloud-like rest, this may be the mattress for you. And, if you need to test it out before determining if it’s the ideal bed for you, Casper offers a 100-night free trial.
