Mattress Sizes Chart & Dimension Guide

Choosing the right mattress size is essential for quality sleep, comfort, and proper body support. Whether you’re a solo sleeper, a couple, or furnishing a guest room, the mattress dimensions you pick should match your height, room size, and mostly your needs.

With so many options like twin, full, queen, king, and more, choosing the best size can feel overwhelming. That’s why we’ve created a comprehensive mattress size chart to guide you.

In this article, we’ll explore all mattress sizes and dimensions, along with the ideal sleepers they suit best, to help you find the right fit for your sleeping style.

Mattress sizes and dimensions chart

Mattress Sizes	Dimensions in Inches	Dimensions in cm.	Recommended Room Size	Number of sleepers	Ideal Sleeper Height
Standard Twin	38” x 75”	96.5 x 190.5 cm	7 x 9 feet (63 square feet)	1	<6’.
Twin XL	38” x 80”	96.5 x 203.2 cm	8 x 10 feet (80 square feet)	1	6’ to 6’4”.
Standard Full	54” x 75”	137.16 x 190.5 cm	9 x 10 feet (90 square feet)	1-2	<6’
Full XL	54” x 80”	137.16 x 203.2 cm	10 x 10 feet (100 square feet)	1-2	6’ to 6’4”.
Small Single	30” x 75”	76.2 x 190.5 cm	7 x 9 feet (63 square feet)	1	<6’
Super Single	42” x 75”	106.68 x 190.5 cm	7 x 9 feet (63 square feet)	1	<6’
Standard Queen	60” x 80”	152.4 x 203.2 cm	10 x 10 feet (100 square feet)	1-2	6’ to 6’4”.
Short Queen	60” x 75”	152.4 x 190.2 cm	9 x 9 feet (81 square feet)	1-2	<6’
Olympic Queen	66” x 80”	167.64 x 203.2 cm	10 x 10 feet (100 square feet)	1-2	6’ to 6’4”.
Standard King	76” x 80”	193.04 x 203.2 cm	12 x 12 feet (144 square feet)	2+	6’ to 6’4”.
California King	72” x 84”	182.88 x 213.36 cm	12 x 12 feet (144 square feet)	1-2	6’5”
Short King	72” x 75”	182.88 x 190.2 cm	12 x 12 feet (144 square feet)	1-2	<6’
Texas King	80” x 98”	203.2 x 249 cm	12 x 14 feet (168 square feet)	2+	6’5” to 7’
Wyoming King	84” x 84”	213.36 x 213.36 cm	12 x 12 feet (144 square feet)	2+	6’5”
Alaskan King	108” x 108”	274.32 x 274.32 cm	16 x 16 feet (256 square feet)	2+	7’<
Family size	80” x 120”	203.2 x 304.8 cm	12 x 17 feet (204 square feet)	2+	7’<
Family XL	84” x 144”	213.36 x 365.76 cm	12 x 17 feet (204 square feet)	2+	7’<
Crib	28″ x 52”	71 x 132 cm	—	—	—
Cot	23.6” x 47.2”	60 x 120 cm	—	—	—
Three quarter	48” x 75”	121.92 x 190.2 cm	7 x 9 feet (63 square feet)	1	<6’

Mattress Dimensions Guide

We have listed 20 different mattress sizes commonly available in the U.S. market. Let’s explore each one in detail.

Twin

Dimensions (width x length): 38” x 75” (96.5 x 190.5 cm)
Best for: Kids, bunk beds, and single sleepers who sleep alone.
Recommended Room Size: 7 x 9 feet (63 square feet)

Twin mattresses are the smallest standard-size mattresses. They measure 38 inches wide and 75 inches long and have a thickness of around 8 to 12 inches. These mattresses are ideal for single sleepers, children, or adults who like to sleep alone in a small space.

Twin-size mattresses typically fit a room size of 7 x 9 feet. But if you add outfits like a desk, dresser, and cozy accessories, and want to fit the bed comfortably, you need an 8 x 10 square foot room.

Shop Twin Mattress

Twin XL

Dimensions (width x length): 38” x 80” (96.5 x 203.2 cm)
Best for: Tall sleeper who sleeps alone and wants extra legroom over a standard twin
Recommended Room Size: 8 x 10 feet (80 square feet)

Twin XL mattresses are 5 inches longer than a twin-size, which measures 38 inches wide and 80 inches long. They are ideal for single sleepers who are taller than 6 feet. Also, these mattresses are among the most popular options for college dorm rooms.

Standard Full

Dimensions (width x length): 54” x 75” (137.16 x 190.5 cm)
Best for: single sleepers or couples who primarily cuddle and snuggle
Recommended Room Size: 9 x 10 feet (90 square feet)

Standard full mattresses are also known as double-size mattresses. They are typically 16 inches wider than a twin, which measures 54 inches wide and 75 inches long. These mattresses are a good fit for young adults who are recent grads living independently for the first time.

However, full-size mattresses are not recommended for couples who share a bed with children or pets. But, they can be a good choice for a guest room or couples who like romance and a solid night in a narrow space.

Full xl

Dimensions (width x length): 54” x 80” (137.16 x 203.2 cm)
Best for: Single sleepers and couples who need extra legroom.
Recommended Room Size: 10 x 10 feet (100 square feet)

Full XL mattresses are 5 inches longer than a standard full mattress. They are usually 54 inches wide by 80 inches long. This size mattress is ideal for single sleepers and couples who find a standard full mattress too small and don’t get enough legroom. However, they can be a good option for those who have a larger body, and can also be used for dorm rooms or guest rooms.

Small single

Dimensions (width x length): 30” x 75” (76.2 x 190.5 cm)
Best for: Single sleeper, like children, teens, or adults who are under 6 feet tall.
Recommended Room Size: 7 x 9 feet (63 square feet)

Small single mattresses are the same length as twin mattresses but are 8 inches narrower in width, measuring 30 inches wide and 75 inches long. These mattresses are typically designed for adolescents and children transitioning from cribs. They can be properly fitted in a small space to maintain room space efficiency.

Super single

Dimensions (width x length): 42” x 75” (106.68 x 190.5 cm)
Best for: Individuals who need more space than a small single bed
Recommended Room Size: 7 x 9 feet (63 square feet)

Super single mattresses are a wider version of a standard single mattress, which has dimensions of 42 x 75 inches (width x length). They are a good size for custom loft bed frames because plywood comes around 42″ long. This extra width is ideal for someone who finds a single mattress too confining or tends to move around a lot in their sleep.

Standard Queen

Dimensions (width x length): 60” x 80” (152.4 x 203.2 cm)
Best for: Individuals who need plenty of space or Couples
Recommended Room Size: 10 x 10 feet (100 square feet)

Queen mattresses are the most popular mattress size available. They are typically 60 inches wide and 80 inches long, offering enough space for new couples or individuals who like more space. These mattresses are traditionally used in each master bedroom. The queen mattress also comes in split options that can be more suitable for some couples.

Short Queen

Dimensions (width x length): 60” x 75” (152.4 x 190.2 cm)
Best for: Individuals or couples who don’t require much space like a standard queen bed
Recommended Room Size: 9 x 9 feet (81 square feet)

Short queen mattresses, also known as RV queen, are typically 60 inches wide and 75 inches long. They are the same width but are 5 inches shorter than the standard queen mattress. These mattresses are perfect for small rooms and guestrooms, especially for RVs and Campers. Using a short queen mattress in an RV is beneficial because the bed doesn’t bend, making it much more comfortable to sleep on with the slide in.

Olympic Queen

Dimensions (width x length): 66” x 80” (167.64 x 203.2 cm)
Best for: Couples who desire more personal space in their bed than a standard queen.
Recommended Room Size: 10 x 10 feet (100 square feet)

Olympic queen mattresses, also known as super queen and expanded queen, measure 66 inches wide and 80 inches long. They are typically the same length and 6 inches wider than the standard queen. These extra six inches of width create a big difference in comfort, especially for couples who prefer more space while sleeping. Also, for those who share their beds with pets, these queen beds can accommodate them comfortably without feeling like they are on top of each other.

Standard King

Dimensions (width x length): 76” x 80” (193.04 x 203.2 cm)
Best for: Couples who want plenty of space to stretch out, or for families who co-sleep with kids or pets.
Recommended Room Size: 12 x 12 feet (144 square feet)

Standard king-size mattresses are 76 inches wide and 80 inches long, enough to accommodate couples who share a bed with their pet and children. They are also good for couples who want more space than a queen bed to stretch out. Two twin XL mattresses combined make a king, referred to as a split king. King-size beds are large enough for both sleepers to sprawl out comfortably with extra room available.

California King Size

Dimensions (width x length): 72” x 84 inches, 182.88 x 213.36 cm
Ideal sleeper: Individuals or couples who need more legroom
Recommended Room Size: 12 x 12 feet (144 square feet)

California King mattresses are 72 inches wide and 84 inches long, which is generous for individuals around 7 feet tall who prefer more legroom. It is also beneficial for average-height individuals and is ideal for families sharing the bed with children and pets. Cal king beds are a good fit for a mostly oversized bedroom with luxurious sleeping space.

Short King

Dimensions (width x length): 72” x 75” (182.88 x 190.2 cm)
Best for: Individuals or couples who want plenty of space for stretching out
Recommended Room Size: 12 x 12 feet (144 square feet)

Short king mattresses, also known as RV king, measure 72 inches wide and 75 inches long. They are typically 5 inches short and 4 inches wider than a standard king-size mattress. These mattresses are specially designed for RVs and campers. However, they can be perfect for small bedrooms and guest rooms. Also, people who are above 6 inches tall and love more space to sprawl, a short king mattress ensures them comfort in sleeping.

Texas king

Dimensions (width x length): 80” x 98” (203.2 x 249 cm)
Best for: Individuals around 7 feet tall who need extra space to stretch out, or a co-sleeping family
Recommended Room Size: 12 x 14 feet (168 square feet)

Texas King mattresses are the second-largest mattresses available on the market. They are typically 80 inches wide and 98 inches long. Although these mattresses are 4 inches narrower than a Wyoming king, but 4 inches wider than a standard king mattress. Texas kings are ideal for families who co-sleep with kids and pets. So, they can easily accommodate a couple and one or two children.

Wyoming king

Dimensions (width x length): 84” x 84” (213.36 x 213.36 cm)
Best for: Two adults, couples, or families with a child or pet
Recommended Room Size: 12 x 12 feet (144 square feet)

Wyoming King is the most luxurious commercially available mattress size on the market. With its impressive 84-inch width and 84-inch height, the Wyoming king mattress provides ample space for families with children. This mattress is typically 8 inches wider and 4 inches taller than the standard-size mattress. This extra space of a Wyoming King mattress is ideal for families with kids or pets, or couples who just prefer a lot of space for quality sleep freedom.

Alaskan King

Dimensions (width x length): 108” x 108” (274.32 x 274.32 cm)
Best for: Taller and larger individuals or couples who need more legroom or space to spread out
Recommended Room Size: 16 x 16 feet (256 square feet)

Alaska king mattresses are the largest mattress size available on the market so far. They typically measure 108 inches wide and 108 inches long. They are almost twice as wide as a standard queen-size mattress.

Alaskan king-size mattresses offer plenty of space for a big family with kids or pets. They can easily accommodate four adults or a family of two adults with two or three kids. Also, these can be a perfect choice for couples who want to enjoy the freedom of sprawling out at night without separating partners.

Family

Dimensions (width x length): 80” x 120” (203.2 x 304.8 cm)
Best for: Families with 3+ children or those who want the most space possible
Recommended Room Size: 12 x 17 feet (204 square feet)

Family-size mattresses are typically 80 inches wide and 120 inches long. They are usually made with luxury materials like cooling gels and supportive memory foam that offer a comfortable sleep experience for everyone. These are ideal for a large family that co-sleeps with their kids. Note that co-sleeping seems like a complex thing, but it is a quick process that would get old soon.

Family xl

Dimensions (width x length): 84” x 144” (213.36 x 365.76 cm)
Best for: Multiple sleepers, including the fur babies
Recommended Room Size: 12 x 17 feet (204 square feet)

Family XL mattress is a supersized mattress designed to sleep with multiple people, like a larger family with kids and pets. This mattress is typically 84 inches wide and 144 inches long, with around 13 inches of thickness. Family XL mattresses are 36 inches wider than Alaska King mattresses, making them perfect for families who love to co-sleep with their kids and pets, or who simply prefer ample space to sprawl while sleeping.

Crib

Dimensions (width x length): 28″ x 52” (71 x 132 cm)
Best for: Toddlers under 18 months of age

The crib mattress is well known as a mini bed or junior bed. The dimensions of this mattress are typically 28″ x 52” with a 6-inch thickness. The crib mattress is specially made for infants and toddlers. Mattress extra length has breathable benefits. Infants’ breathing during sleep time decreases SIDS risk.

Cot

Dimensions (width x length): 23.6” x 47.2” (60 x 120 cm)
Best for: Babies under 4 years of age

Basically, cot mattresses are the same as crib mattresses but are much softer than Cribs. It has 3 built-in storage drawers and 2 height levels, converts to a toddler bed, and has everything that is needed. But remember, the deeper the mattress, the greater the risk that the baby gets their face trapped while sleeping on their tummy because of the extra softness, which can increase the SIDS risk.

Three Quarter

Dimensions (width x length): 48” x 75” (121.92 x 190.2 cm)
Ideal sleeper: Single sleepers who need more space than a single mattress but not as much as a double mattress
Recommended Room Size: 7 x 9 feet (63 square feet)

Three-quarter mattresses are not as common as other mattresses and are larger than a small single but smaller than a Full. They typically measure 48 inches wide by 75 inches long. These mattresses are an ideal choice for single sleepers who want more space than a single mattress provides. However, they may not be large enough for some couples who tend to sprawl out when they sleep.

What are standard mattress sizes?

There are different sizes of mattresses available; the standard sizes among them are twin, full, queen, and king. The most common and popular mattress size is the queen mattress, which is usually chosen by most people. The standard king mattresses are also loved by most people.

How do I know my mattress size?

You need to take a few steps to know the size of your mattress. First, take a measuring tape and measure the mattress’s height, width, length, and thickness one by one. Note down those measurements, and then you will be able to know your exact mattress size. Follow these three simple steps to measure your mattress size:

Height measurement: Measure from the top surface to the bottom of the mattress using a tape measure. Record the height in inches.
Width measurement: Measure from one side of the mattress to the other (left to right) across the top. This gives you the width in inches.
Length measurement: Measure from the head of the mattress to the foot (front to back) along the top surface. Note the length in inches.

Conclusion

Choosing the right mattress size is just as important as choosing the right comfort level. Consider both your needs and your bedroom space. With the information provided above, you will be well-equipped to select the perfect mattress size for a comfortable and restful sleep. So, consider your needs, your height, and your room size, and choose the one that best fits your requirements. Don’t hesitate to try out different mattresses before making your final decision to ensure that it is comfortable and supportive.

Mattress Sizes Chart & Dimension Guide – 2025 Edition