Mattress Sizes | Conversion & Charts for Twin, King, Queen Sizes

Picking the right size of the mattress to buy isn’t that easy considering the wide choices available for you to choose from. You can find twin, king, queen size mattresses, but increasingly in the US, you may also find more variations like California king, full XL, extra long, and Eastern king.

Choosing the right mattress size depends largely on your preference, but understanding some important considerations like the specs, dimensions, and your room size will help you narrow down the options to help you find the right bed size that will suit your specific needs.

We’ve rounded up a complete guide of all the things you’ll need to think about when you’re buying a mattress. What size should I get? What type of mattress suits my lifestyle? What mattress size is best for me? We’ve also added conversion charts to make it easier to buy a mattress from practically every place in the world.

Understanding Mattress Size

Different mattress sizes serve different purposes. Each one is made and designed to meet a specific need, considering important factors such as the size of the room, whether you share the bed or not – if yes, a partner? Pets? and it also considers how active of a sleeper you are.

When you’re thinking of buying a mattress, you may also add more details to narrow down your options in the store – are you sleeping with a husband, a wife, a partner, children or pets? Are you on the shorter or taller side? What’s your body frame? And lastly, and probably the first factor you consider – how large is the room?

It will be very helpful to record the dimensions of the bedroom before heading out. Do some research on the styles and functions, weigh the available options.

Kinds of Mattress Sizes

In the US, mattress sizes are often assigned non-numeric labels or “nickname” such as “queen” or “twin” which has a corresponding measurement in inches. Different manufacturers offer many sizes variations, but the most common mattress sizes are twin, twin XL, full, full XL, queen, king, and California king.

Here are the common mattress sizes:

    • Twin (39”x 75”)

Twin size mattresses are good for tiny spaces since it is the smallest of the standard mattress sizes in the US measuring 39 inches by 75 inches. This bed size is good for kids to teens, and for single sleepers in general, who are not that active during the night. This is not for sharing. Since this is the smallest type, twin size mattresses are extreme space savers that can be used in the bedroom, dorm room or apartment. Twin size mattresses are also the least expensive.

    • Twin XL (39”x 80”)

Twin XL mattresses generally have the same size as the twin size but is 5-inches longer on the length. This size, which measures 39 inches by 80 inches is made for tall individuals who are also not active sleepers. Since this has the same width size as the twin size, the twin XL mattress will also save space in the bedroom. This type is also not meant for sharing and is best for growing teens or tall adults who have small space for the bed or in a dormitory.

    • Full/Double (54”x 75”)

The full sized mattress as “Double” size in mattresses. This size has more space than the twin, measuring 54 inches by 75 inches and used to be the standard size for couples – until the Queen size. The price point is somewhere between the twin and close to the price of the Queen size. Full-size mattresses will still have space constraints with sharing. This size works well for active sleepers and teens in their transition period.

    • Full XL (54”x 80”)

Full XL size mattresses have the same size as the full size in terms of width, but as the twin XL size, this is also 5-inches longer than the full/double size. Full XL, which measures 54 inches by 80 inches, is a mattress size recommended for tall teens or adults who wants more space than a twin, but could not fit a Queen size. This is still best for single individuals and not meant for sharing. This could also work for tall, active sleepers who prefer the largest bed size available for individual use.

    • Queen (60”x 80”)

Queen size mattresses, which measures 60 inches by 80 inches, are the “gold standard” for sharing and also for tall people. They have enough width to accommodate couples and is generally tagged as the “most cost-effective” among all the bed sizes in terms of area size and price point. The queen size is usually the ideal mattress size for the master bedroom.

    • King (76”x 80”)

King size mattresses are made for people who want the luxury of space. This is ideal for couples or sharing who are either active and/or very light sleeper since this size, at 76 inches by 80 inches, provides plenty of space for each individual to move around the bed without interfering on each other’s sleep.

Since this is the largest size under the standard mattress sizing in the US, it also means that the king size also tends to be the most expensive for any given mattress size model. Check the floor space before buying a king size bed, to make sure you have enough space to accommodate this size and still have room for walkways and other room fixtures.

    • California King (72”x 84”)

The California King size mattress is made for tall people whose feet usually hang off the end of most bed sizes. The California King size, in general, is 4-inches lesser in width but also 4-inches longer than that of the king size making it the longest available standard mattress size. This size, at 72 inches by 84 inches, is still good for sharing and for tall people who always have difficulty with the length of normal bed sizes.


Mattress Size Chart

There are several mattresses sizes US manufacturers offer. Here is the selection of the most common of these, starting with the smallest. The width is stated first, then the length. Dimensions are in inches. There may be manufacturing variations, so measure your existing mattress or your base to be sure of getting the right size.

Mattress Size
Best For
27” x 52”
68.5cm x 132cmBabies
39” x 75”
96.5cm x 190.5cmToddlers, Children, Single Adults
Twin XL
39” x 80”
96.5cm x 203.5cmChildren, single tall adults
Full XL/Double54” x 80”
134.5cm x 190.5cmChildren, single adults, single adults with children or pets
60” x 80”
152.5cm x 203.5cmSingle adults, single adults with children or pets, couples
76” x 80”
193cm x 203.5cmCouples, couples with children or pets, wide space
California King
72” x 84”
183cm x 213.5cmCouples, tall people with children or pets
Texas King
80” x 98”189cm x 200cm
Couples, couples with children or pets; customized

Mattress Sizes Conversion Chart

There is no one international mattress size standard in the world. Bed and mattress sizes vary from country to country and in most cases, also depending on the manufacturer.

The “king size” in the US for example, tends to be different than the “king size” labeled in the UK. Remember that the “nickname” given to the mattress sizes do not represent standard sizes and are merely non-numeric labels so it should not be used for defining dimensions of beds or mattresses around the world. A “king size” in the US measures 76” x 80” long, but in the UK standards, it measures 60” x 78”.

Mattress Size
US/CanadaEuropeUKAsia (Japan)
Single27” x 52”
75cm x 142cm31” × 75”
33” × 77”
39” x 75”
90cm x 190cm36” x 75”

38” × 77”
Twin XL
39” x 80”
120cm x 190cm35” × 79”38” × 81”
Full/Double54” x 80”
135cm x 190cm55” × 79”
55” × 77”
60” x 80”
120cm x 190cm63” × 75”61” × 77”
76” x 80”
150cm x 198cm
63” × 79”
67” × 77”
California King
72” x 84”
183cm x 198cm71” × 79”
67” × 81”

Useful Tips for Buying Mattress

In buying the mattress remember the following tips:

  • The bed size should be large enough for your personal space, but also allowing enough space for you and your partner to move freely without disturbing each other.
  • The bed size should fit the floor space in your house or room where it will be placed.
  • The size should also be enough for the door space in your home, condo or the door/window where the bed will pass through.
  • The mattress size should fit the bed properly, with enough length and width so it covers the whole bed but does not drop to the floor.
  • Different mattress manufacturers may have their own dimension for the non-numeric tags they designate for the mattress sizes so it is better to check the dimensions and not the “nicknames” when buying.
  • Make sure the dimensions are correct because mattress and bed sizes vary between countries – and occasionally even between manufacturers too.

How to Clean Mattresses

Purchasing the right mattress for your specific need is not the end of it. Cleaning it and maintaining your mattress is another way to ensure the mattress remains clean, fresh and free from allergens, bacteria, dust, and molds.

Doing routine cleaning can also help you address spots, odors, stains, and even bed bugs and dust mites. Here are the steps you can follow to ensure that your mattress is always clean:

    • Wash your bedding regularly: to start cleaning your mattress, you have to remove everything on it first – pillows, blankets, stuffed animals. Strip the linens too and all the sheets covering the mattress.
    • Vacuum your mattress every few months: vacuum is the first step to clean your mattress and remove dust, mites, dead skin, hair and other allergens in your mattress. Use the vacuum nozzle to get into the cracks and edges of the mattress. It is recommended that you clean your mattress at least every six months.
    • Clean spills immediately: any mattress spill that is fresh and still wet should be cleaned immediately with a clean piece of damp cloth with cold water. Blot the spill repeatedly using the damp cloth until it absorbs the spill completely. Use two tablespoons of hydrogen peroxide and 1 tablespoon of liquid dish soap for harder stains like those from food and drinks. Gently scrub the soap mix with an old toothbrush or sud to the affected area of the mattress. Wipe away the excess cleaner with a damp cloth.
    • Sanitize with baking soda: once you’re done cleaning the stains, sprinkle a generous amount of baking soda over the mattress to further sanitize and deodorize the mattress. You can opt to add 3-5 drops of your favorite essential oil into the baking soda before sprinkling it to add a nice scent to it. You may also apply the baking soda evenly on the surface of the mattress. Leave the baking soda there for at least 30 mins.
    • Vacuum the mattress, again: when the baking soda was soaked on the surfaces of your mattress, remove it using a vacuum. This will essentially remove all the odors, stains and acids that the baking soda has absorbed. Use the vacuum nozzle for the cracks and edges.
    • Let the mattress air out: when you’re done disinfecting, deodorizing and cleaning the mattress, it’s always a good idea to air it out so that moisture trapped inside the mattress will dry and not create molds otherwise. Fresh air dry is recommended as the UV rays can also help kill the bacteria, and eliminate odors faster.
    • Flip the mattress: when you’re ready to use your newly-cleaned mattress, turn it upside down so you will be sleeping on another side to also help preserve the wear and tear of the mattress.
    • Apply a mattress protector: this is a must. A mattress protector is often made of a plastic case that can keep your mattress clean and free from spills, dust, dirt, stains, and even bed bugs. If you don’t prefer plastic, there are also mattress pads available to protect the top of your mattress from dirt and spills.

What is the ideal mattress for kids?

The right mattress size for your child is essential to ensure a good night’s sleep, proper support for your child’s posture and sometimes, even in encouraging healthy sleeping habits that’s good for your child. Since mattresses are usually durable and can last up to 10 years, it is important to find the mattress that your child can grow with and accommodate developing body structure. Here are the things you need to consider when buying one:

      • Choose the right size: a twin-sized mattress is often a good option for growing children. This mattress is ideal for space-saving rooms, and will also work well if you have two or more children sharing one room. A twin XL or a full-sized bed could be other options once your child starts growing taller and for the more active sleeper. A twin XL mattress is slightly longer and a full-sized mattress is ideal for more spacious rooms and can accommodate more than one child. The full-size mattress can often grow with your child even up to early adulthood.
      • Check the materials: as important as choosing the right mattress size is also picking the bed with the right materials. Kids can sometimes be allergic to synthetic materials that could lead to skin irritation or respiratory problems. To prevent such a risk, parents could opt for a mattress made of organic or natural materials like cotton, organic wool, silk, natural latex, and even bamboo. If unsure, read the label of the mattress for the list of materials.
      • Select the right support type:mattresses often use innerspring coils or memor foam depeding on specific needs. Innerspring mattresses are often recommended for growing children, because their weight is just enough not to damage the coils. Memory foam is often feels cooler for the child but the cost may be expensive.
      • Pick the specific level of comfort required: mattresses come in different level of comfort specification. There is extra firm, firm, plush and ultra-plush. Ultra-plush mattresses are often the softest. Back and side sleepers usually prefer firm mattresses which gives enough back support, while a medium-firm mattress is ideal for stomach sleepers.


1. How are mattresses recycled?

Most mattresses, if not all, are highly recyclable. For the innerspring mattress, for example, you can recycle the steel springs and other parts. When you’re bent on disposing it, ask the store where you will get your new mattress to pick up the old one for recycling or disposal. Call your local municipality or sanitation department for collection of bigger items, or you may look up mattress recyclers near you.

2. What are the signs that you need to clean your mattress?

The following are signs that your mattress is due for cleaning: 1) when you haven’t cleaned it in months. Remember that mattresses should be cleaned at least every six months; 2) you’re growing allergies when sleeping. Dust buildup can aggravate allergies and make you uneasy all through the night if you start feeling any symptoms of it, it’s probably time to clean it; 3) you’ve noticed bugs or strange bites. While it’s not always easy to spot bed bugs as they are microscopic, spotting unusual bites on your body is a sign; 4) your mattress has an odor. mattresses can smell from dust and skin buildup, or have an odor from bodily fluids, even mold, when you observe any of it, time to clean it.

3. When to replace mattresses?

Most mattresses are durable and can be used for 7-10 years before they are too worn out. It’s almost always worth it to use a mattress with a slight stain or odor than to completely replace the mattress with a new one which can be really expensive.

4. Which mattress is best for back pain?

Choosing a suitable mattress depends on the level of comfort you’ll need for your back pain. In general, though, the medium-firm memory foam mattress is seen to be the best suit for those suffering backaches. Unlike innerspring mattresses, memory foam generally contours the entire body as it is often packed with the gel-like covered surface. The medium-firm type also allows the spine to rest in a natural, comfortable position.

5. How to remove stains from mattresses?

There are different ways to remove different kinds of stains on the mattress. For yellow stains, use hot water and vinegar. For blood stains, pray the area with equal parts of cold water and hydrogen peroxide, then blot the mattress with a clean cloth damp in cold water. For ink stain, use a cheap hairspray to bring up the stain then spray the stain lightly with water and do repeated blotting until the ink is gone.

6. Which is the best mattress?

It’s always difficult to pinpoint one best mattress for everybody. Each individual should choose the type of mattress that best suit their needs, budget and space considerations. For kids, there is also the factor of anticipating their growth and identifying whether or not they are active sleepers or sharing the bed. The best way to identify the best mattress for you is to know your needs and do a little research before heading to the store to get one.