Choosing Mattress size can be confusing. This Mattress Sizes and Bed Size Guide will explain the fundamental proportions of all the standard mattress sizes to help you decide the right one for you.

Bed & Mattress Size Comparison Chart

Understanding which mattress size is best for you

Print Mattress Size Chart

Mattress Size

Dimensions in inches

Dimensions in feet

Dimensions in CM

King 76” x 80” 6.33 x 6.67 193.04 x 203.2 Shop
california King 72” x 84” 6 x 7 182.88 x 213.36 Shop
Queen 60” x 80” 5 x 6.67 152.4 x 203.2 Shop
Full 54” x 75” 4.5 x 6.25 137.16 x 190.5 Shop
Twin XL 39” x 80” 3.25 x 6.67 99.06 x 203.2 Shop
Twin 39” x 75” 3.25 x 6.67 99.06 x 190.5 Shop

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king size mattress dimension illustration

King Mattress Size Dimensions: 76” x 80”

A King size mattress is 76 inches wide and 80 inches long (194 cm x 204 cm). It's spacious for couples and perfect for families with children or pets.If you are confused, should you buy king or any other size, you may want to compare it to other mattress sizes: King vs Queen, King vs Cal King, King vs Split King.

Best For

A couple who loves to stretch out and share the bed with a small child or a pet.

Room Size

The ideal room size for a King size mattress would be 13 feet by 13 feet up to 13 feet by 19 feet. King size is great for master bedrooms or the primary bedroom of the house.

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California King Size Mattress Dimensions Illustration

California King Mattress Size Dimensions: 72” x 84”

A California King size mattress is 72 inches wide and 84 inches long (183 cm x 213.5 cm). California King size mattresses are best for individuals or couples taller than 6 feet. A Cal king mattress is also a great choice for pet parents whose pets like to snuggle with them.

Before purchasing the mattress for yourself, compare Cal king with other mattress sizes: King vs Cal King, Cal King vs Queen.

Best For

Tall people who love to have enough legroom and maybe have a pet join them.

Room Size

A long but narrow bedroom, 10 feet by 12 feet up to 13 feet by 19 feet, can hold a California King bed.

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Queen Size Mattres Dimensions Illustration

Queen Size Mattress Dimensions: 60” x 80”

A Queen size mattress is 60 inches wide and 80 inches long (167 cm x 203.5 cm). A Queen size bed is the most popular choice among couples. A queen mattress can comfortably accommodate a child and a pet with a single adult. Queen size mattresses are the most purchased size as they are compact yet spacious.

Even though they are the most popular mattresses, compare Queen mattress with other mattress sizes: Queen vs King, Queen vs Cal King, Queen vs Full.

Best For

Couples who love cuddling, a young child with a parent, or a single person with a dog.

Room Size

For a Queen mattress size, the recommended room size can vary from 10 feet by 10 feet up to 10 feet by 14 feet. A Queen bed size is also an excellent option for couples who like to have more floor space in their bedroom.

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Full Size Mattress Dimensions Illustration

Full Mattress Size Dimensions: 54” x 75”

A Full-size mattress is 54 inches wide and 75 inches long (134.5 cm x 203.5 cm). Also known as double beds, Full-size mattresses are ideal for singles! They are 5 inches shorter and 6 inches narrower compared to a Queen size mattress.

To know whether a Full size mattress is the right size for you, compare it to other mattress sizes: Full vs Queen, Full vs Twin XL, Full vs King.

Best For

Teenagers, young adults, a child with a parent, or a single person with a pet.

Room Size

For a full size mattress to fit, a bedroom should be 9 feet by 9.6 feet. Full bed size is ideal for guest rooms, dorm rooms, or studio apartments.

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Twin Xl Size-mattress Dimensions Illustration

Twin XL Mattress Size Dimensions: 38” x 80”

A Twin XL mattress is 38 inches wide and 80 inches long (96.5 cm x 203.5 cm). A Twin XL is 5 inches longer than a Twin size mattress. A Twin XL mattress is the best choice for fast-growing teens or adults who prefer compact sleeping spaces. It’s not just a Twin XL mattress that fits your growing adults; there are others too, hence compare it to other mattress sizes: Full vs Twin XL, Twin XL vs Queen, Twin vs Twin XL.

Best For

Young children up to 12 years old, young adults, and college dorm rooms.

Room Size

A bedroom should be at least 8 feet by 10 feet in size. A Twin XL bed can fit in the children’s bedroom or a dorm room.

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Twin Size Mattress Dimensions Illustration

Twin Mattress Size Dimensions: 39” x 75”

Twin size mattresses are 38 inches wide and 75 inches long (96.5 x 188 cm). These mattresses can be used on a bunk bed with similar dimensions or on a small bed meant for children.

To know if a Twin size mattress is a right size for you, compare it to other mattress sizes: Twin vs Twin XL, Twin vs Full.

Best For

Children 2-12 years old, bunk beds.

Room Size

A bedroom should be at least 7 feet by 10 feet in size. If putting two Twin beds together in a room, it should be 9 feet by 9 feet.

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Other Mattress Sizes

Crib Size Mattress Dimensions Illustration

Crib Mattress Size Dimensions: 28” X 50” | 2.3 X 4.6 Feet

Crib size mattresses are 28 inches wide and 50 inches long (70 X 127 cms). A crib size mattress is the smallest mattress size available on the market and is primarily designed for toddlers and small children.Because of its small dimensions, it can easily fit into a children’s room. It can also be placed in the same room as yours if the bedroom is large.

Small single Size Mattress Dimensions Illustration

Small Single Mattress Size Dimensions: 30” X 75” | 2.6 X 6.2 Feet

A small single bed is a long narrow bed 30 inches wide and 75 inches long (75 X 190 cms). It is a good fit for children’s narrow beds with extra length for tall teens. They can also be used for the spare room in your house and can be used to aesthetically enhance your lounging space in the house.

Olympic Queen Size Mattress Dimensions Illustration

Olympic Queen Mattress Size Dimensions: 66” X 80” | 5.5 X 6.6 Feet

An Olympic queen size mattress is 66 inches wide and 80 inches long (168 X 201 cms). Because it is an uncommon size, it can be challenging to accessorize it or find a bed frame for it. This is an excellent choice for couples who want more space than a standard queen-size mattress. This size lies somewhere between a king and a queen and is a good fit for the master bedroom of the house.

Split King Size Mattress Dimensions Illustration

Split King Mattress size Dimensions: 38” X 80” | 3.25 X 6.67 Feet

A Split King mattress is two Twin XL mattresses (38 inches x 80 inches) put together, making it 76 inches wide and 80 inches long king size mattress. A split king mattress is popularly used with adjustable beds, and each side of the bed can have an independent setting. It limits motion transfer to a large extent, helping light sleepers fall asleep easily.

Who’s using the mattress?

If you are confused about the different sizes of beds or mattress sizes to choose from, follow these guidelines.

  • Teenagers & Single Adults

    Teenagers & Single adults

    • Full
    • Queen
    • Twin XL

    A twin XL, full or Queen mattress are recommended for teenagers or single adults as they tend to require legroom. So, you can always buy a mattress that has enough leg space for them to stretch out.

  • Couples


    • Queen
    • King
    • Cal King

    A Queen, King and Cal King mattresses are the most popular choice among couples, as all these mattresses help you have an intimate cuddle session as well as some personal sleeping space.

  • Children


    • Twin
    • Twin XL
    • Full

    A Twin, Twin XL or a full size mattress is preferred for children's bedrooms as they usually outgrow real soon. Because, if you purchase a smaller mattress for them, you will have to buy a new mattress in a short period. Also, let your children grow well by letting them stretch out and sleep.

  • Adults With Pets Or Children

    Adults with pets or Children

    • King
    • Cal King
    • Queen
    • Full

    Well, a queen, king, cal king or a full size mattress is recommended for adults with pets or children. Usually, a compact mattress with enough space to snuggle or leg space is a good option.

Size of the Bed Room:

The size of your bedroom is crucial when choosing a mattress. Trying to fit a King size mattress in a small room would make the space look cramped up and would not leave any room for extra furniture. A twin-size mattress in a master bedroom would make your space look empty. Hence, choose your mattress size as per your room size and not just have a comfortable sleep but also make your room look aesthetically beautiful.

Body Weight and Height:

A medium firm or firm mattress is perfect for all body weight. If you wake up with body aches or sore muscles then kindly consult your Orthopedic or Chiropractor before buying a new mattress.

Sleeping Position:

Your and your partner’s sleeping position needs to be considered before you buy a mattress. A wider mattress like King or California King mattress would be ideal if you like to have personal sleeping space or stretch out. Whereas a Queen mattress would be an excellent choice for those who like to cuddle and sleep.


The rule of the thumb is that the bigger the mattress, the more expensive it will be. However, this can change depending on the brand, the material, and its technology.

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Which Mattress Size Is Right For You?

Twin38”W x 75”L x 12”H 39 LBS
Twin XL 38”W x 80”L x 12”H 42 LBS
Full54”W x 75”L x 12”H 54 LBS
Queen60”W x 80”L x 12”H 66 LBS
King76”W x 80”L x 12”H 83 LBS
Cal King 72”W x 84”L x 12”H 82 LBS
Split King 76”W x 80”L x 12”H 84 LBS

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