2026 Complete Guide

Mattress Size Chart &Bed Dimensions (2026 Guide)

The most popular mattress sizes in USA are Queen(60″×80″) and Twin(38″×75″). Most people are familiar with standard options like Twin, Queen, and King etc... Some specialty mattress sizes designed for specific needs are not known by normal people, including taller sleepers, RV use, or large family beds. Include these dimension datas of these mattresses in a mattress size table is more important.

Below is a detailed guide to popular and specialty mattress sizes, including California King, Alaska King, Texas King, Wyoming King, Olympic Queen, Short Queen, Full XL, and Twin XL. This guide also cover RV mattress sizes and European sizes.

Visual Comparison

Mattress Sizes at a Glance

See how standard mattress sizes compare side by side. The most popular size in the US is the Queen (60"×80").

Twin

38"×75"

TXL

Twin XL

38"×80"

Full

54"×75"

Queen ★

Queen

60"×80"

King

76"×80"

Cal King

72"×84"

Standard Mattress Size and Dimension Chart

Mattress Size	Dimensions (Inches)	Dimensions (cm)	Recommended Bed Frame Size
Twin	38" × 75"	96.5 × 190.5	40–43” × 78–80”
Full (Double)	54" × 75"	137 × 190.5	57–60" x 78–80"
Queen Most Popular	60" × 80"	152 × 203.2	63–67" x 83–85"
King	76" × 80"	193 × 203.2	79–82" x 83–85"
California King	72" × 84"	183 × 213.36	75–79" x 87–89"

Detailed Breakdown

Standard Mattress Sizes Explained

Explore each standard size — dimensions, best uses, and who it's right for.

Twin Mattress

Dimensions: 38" × 75" | 96.5 × 190.5 cm

The Twin mattress is the smallest Mattress for one man or a kid.

Twin beds are commonly used in:

kids'rooms
bunk beds
dorm rooms
small bedrooms

Because of its compact size, a Twin mattress comfortably accommodates sleepers up to around 6'2" tall.

Full Mattress

Dimensions: 54" × 75" | 137 × 190.5 cm

The Full mattress, also known as a Double bed, offers more width than a Twin, giving single sleepers extra room to stretch out. It can also work for couples who don't mind a cozier sleeping space.

Full beds are commonly used in:

Teen bedrooms
Young adult apartments
Guest rooms
Small master bedrooms

With its wider surface, a Full mattress comfortably accommodates single sleepers or couples under 6 feet tall.

Queen Mattress

Dimensions: 60" × 80" | 152 × 203.2 cm

The Queen mattress is the most popular bed size, offering an excellent balance of space, comfort, and practicality. It provides enough room for couples while still fitting well in most bedrooms.

Queen beds are commonly used in:

Master bedrooms
Couples' bedrooms
Guest rooms
Apartments

Because of its generous size, a Queen mattress comfortably accommodates couples or individuals up to around 6'5" tall.

King Mattress

Dimensions: 76" × 80" | 193 × 203.2 cm

The King mattress is the widest standard bed size, offering maximum personal space for couples. Each sleeper gets about the same width as a Twin bed, making it ideal for those who value room to spread out.

King beds are commonly used in:

Large master bedrooms
Luxury homes
Families with children or pets
Couples who prefer extra personal space

With its expansive width, a King mattress comfortably accommodates couples and sleepers up to around 6'5" tall with ample space.

California King Mattress

Dimensions: 72" × 84" | 183 × 213.36 cm

The California King mattress is slightly narrower but longer than a standard King, making it perfect for taller individuals who need extra legroom.

California King beds are commonly used in:

Spacious master bedrooms
Homes in warmer climates (popular in the West Coast)
Tall sleepers
Luxury bedroom setups

Because of its extended length, a California King mattress comfortably accommodates sleepers up to around 6'9" tall.

Special Mattress Size and Dimension Chart

Mattress Size	Dimensions (Inches)	Dimensions (cm)	Bed sizes
Twin XL	38" × 80"	96.5 × 203.2	40–43" × 83–85"
Three Quarter	48" × 75"	121.9 × 190.5	50–53" × 78–80"
Full XL	54" × 80"	137 × 203.2	57–58" × 83–85"
Short Queen	60" × 75"	152 × 190.5	63–64" × 78–80"
Olympic Queen	66" × 80"	167.64 × 203.2	69–70" × 83–85"
Alaska King	108" × 108"	274 × 274	111–112" × 111–112"
Wyoming King	84" × 84"	213 × 213	87–88" × 87–88"
Texas King	80" × 98"	203 × 249	83–84" × 101–103"
Alberta King	96" × 96"	244 × 244	100–102" × 100–102"

Note: Mattress dimensions can vary slightly depending on manufacturing tolerances, but most brands maintain variations within about one inch.

Specialty and Extended Mattress Sizes Explained

Extended Sizes Oversized / Luxury

Twin XL Mattress

Dimensions: 38" × 80"

The Twin XL mattress is a longer version of the standard twin bed. While the width remains the same, the additional five inches of length makes it a great option for taller sleepers.

Twin XL beds are commonly used in:

College dorm rooms Adjustable bed bases Guest rooms with limited space Teen bedrooms

Because of the extended length, Twin XL mattresses comfortably accommodate sleepers up to around 6'7" tall. Two Twin XL mattresses placed side by side are equivalent to one standard king-size mattress, which is why this combination is quite popular in split-king bed setups.

Three Quarter Mattress

Dimensions: 48" × 75"

The Three Quarter mattress is a vintage bed size that falls between a Twin and a Full mattress. It offers more sleeping space than a Twin while taking up less room than a Full, making it a practical option for compact bedrooms.

Three Quarter beds are commonly used in:

Guest rooms Small apartments Antique bed frames Studio living spaces

Because of its slightly wider design, a Three Quarter mattress comfortably accommodates single sleepers who want extra room without needing a larger bed.

Full XL Mattress

Dimensions: 54" × 80"

The Full XL mattress adds extra length to a traditional full mattress. It maintains the same width but extends the length to provide more legroom.

This size is ideal for:

Single sleepers who want more space than a Twin Taller adults Guest rooms Smaller apartments

Full XL mattresses provide more width than a Twin XL while offering the same extended length.

Short Queen Mattress

Dimensions: 60" × 75"

The Short Queen mattress is designed primarily for RVs and campers where space is limited.

Compared with a standard queen mattress, the Short Queen is five inches shorter. This compact design makes it easier to fit into:

RV bedrooms Motorhomes Camper vans Small guest rooms

Despite its shorter length, it still provides enough width for couples who need a space-saving sleeping solution.

Olympic Queen Mattress

Dimensions: 66" × 80"

The Olympic Queen mattress is a wider version of the traditional queen bed.

It offers six extra inches of width compared with a standard queen, making it ideal for couples who want more personal sleeping space without upgrading to a king-size mattress.

Best for:

Couples who feel cramped on a queen bed Medium-sized bedrooms Sleepers who share a bed with pets or children

California King Mattress

Dimensions: 72" × 84"

The California King mattress is one of the most popular large mattress sizes, especially for taller sleepers.

Compared with a standard king mattress, the California King is:

4 inches longer 4 inches narrower

This shape makes it perfect for:

Tall individuals Narrow bedrooms Couples who want extra legroom

Although slightly narrower than a standard king, the added length provides exceptional comfort for people over six feet tall.

Wyoming King Mattress

Dimensions: 84" × 84"

The Wyoming King mattress is a large square bed designed for families or sleepers who want maximum space.

This oversized mattress provides significantly more sleeping area than a standard king.

Ideal for:

Co-sleeping families Couples with pets Large master bedrooms

Because of its size, bedding and bed frames for Wyoming King mattresses often require custom orders.

Texas King Mattress

Dimensions: 80" × 98"

The Texas King mattress is one of the longest mattresses available.

It is specifically designed for extremely tall sleepers or families who share a bed.

Benefits include:

Extra length for tall individuals More room for co-sleeping with children Spacious sleeping surface for couples

The Texas King is particularly popular in large homes where bedroom space is not a limitation.

Alaska King Mattress

Dimensions: 108" × 108"

The Alaska King mattress is the largest commonly available mattress size.

At nine feet by nine feet, this massive mattress provides enough space for multiple sleepers.

Typical uses include:

Family beds Couples with several children Pet owners who share their bed with large animals

Because of its enormous dimensions, the Alaska King requires a large bedroom and often custom bedding.

Alberta King Mattress

Dimensions: 96" × 96"

The Alberta King mattress is an oversized luxury mattress designed for sleepers who want exceptional width and extra sleeping space. It is wider than a standard King mattress, making it ideal for families or couples who prioritize maximum comfort.

At eight feet by eight feet, the Alberta King provides a spacious sleep surface that comfortably accommodates multiple sleepers.

Typical uses include:

Family beds Couples who co-sleep with children Luxury master bedrooms Pet owners who share their bed with pets

Because of its oversized dimensions, the Alberta King mattress requires a large bedroom and typically needs custom bed frames, sheets, and bedding accessories.

Room sizes for all size mattresses

Mattress Size	Dimensions (Inches)	Room sizes（At least）
Twin	38" × 75"	8′ x 10′
Full	54" × 75"	10′ x 10′
Queen	60" × 80"	10′ x 10′
King	76" × 80"	12′ x 12′
California King	72" × 84"	12′ x 12′
Twin XL	38" × 80"	8' × 10'
Full XL	54" × 80"	10′ x 10′
Olympic Queen	66" × 80"	11' × 12'
Alaska King	108" × 108"	16' × 16'
Wyoming King	84" × 84"	13' × 13'
Texas King	80" × 98"	13' × 16'

Note: Before you buy a mattress, you should take care about your room size if it suit for the mattress.

European & Split / Water Mattress Sizes

European Mattress Size Chart

Mattress Size	Dimensions (Inches)	Dimensions (cm)
Small Single	30" × 75"	76.2 × 190.5
Single (EU)	35" × 78"	88.9 × 198.1
Single (UK)	35" × 75"	88.9 × 190.5
Single XL	35" × 82"	88.9 × 208.3
Small Double	47" × 75"	119.4 × 190.5
Double (EU)	55" × 78"	139.7 × 198.1
Double (UK)	53" × 75"	134.6 × 190.5
King (EU)	63" × 79"	160.0 × 200.7
King (UK)	59" × 78"	149.9 × 198.1
Grand / Super King	71" × 79"	180.3 × 200.7

Note: The European mattress sizes are different with the sizes in USA. All the mattress sizes of European are small than the sizes in USA. If you move to USA with your existing bedroom furniture, you can not buy mattress from US market.

Split & Water Mattress Size Chart

Mattress Size	Dimensions (Inches)	Dimensions (cm)
Split Queen (each)	30" × 80"	76.2 × 203.2
Split Cal. King (each)	36" × 84"	91.4 × 213.4
Super Single Waterbed	48" × 84"	121.9 × 213.4
Queen Waterbed	60" × 84"	152.4 × 213.4
King Waterbed	72" × 84"	182.9 × 213.4

Note: Split mattress and water mattress are all rare mattress in the market. The split mattresses have the half width of normal mattresses. Water mattresses have their special sizes.

How to Choose the Right Mattress Size

When selecting a mattress size, consider several key factors:

Bedroom Size

Large mattresses like Texas King or Alaska King require substantial floor space. Ensure your bedroom can accommodate the mattress while leaving room for movement and furniture.

Number of Sleepers

If two adults share the bed—or if children and pets frequently join—larger sizes such as Olympic Queen, California King, or Wyoming King may be more comfortable.

Sleeper Height

Tall sleepers often benefit from longer mattresses like:

Twin XL
Full XL
California King
Texas King

Special Use Cases

Some mattress sizes are designed for specific environments:

Short Queen: RVs and motor homes
Twin XL: dorm rooms and adjustable beds
Alaska King: family sleeping arrangements

Final Thoughts

Understanding mattress dimensions is important for us to choose a bed and know whether it suit for your bedroom. You should choose a mattress that left enough space for your room layout, and make you comfort live in the room. Whether you need a compact Twin XL for a dorm room or a massive Alaska King for a family bed, selecting the right size can significantly improve sleep quality and overall comfort.

Mattresses

Podium™

OmniFit™

Mattress Sizes and Dimensions Guide (2026)

Mattress Size Chart &Bed Dimensions (2026 Guide)

Mattress Sizes at a Glance

Standard Mattress Size and Dimension Chart

Standard Mattress Sizes Explained

Twin Mattress

Twin beds are commonly used in:

Full Mattress

Full beds are commonly used in:

Queen Mattress

Queen beds are commonly used in:

King Mattress

King beds are commonly used in:

California King Mattress

California King beds are commonly used in:

Special Mattress Size and Dimension Chart

Specialty and Extended Mattress Sizes Explained

Room sizes for all size mattresses

European & Split / Water Mattress Sizes

European Mattress Size Chart

Split & Water Mattress Size Chart

How to Choose the Right Mattress Size

Bedroom Size

Number of Sleepers

Sleeper Height

Special Use Cases

Final Thoughts

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