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Mattress Size Reference Guide

An Industry Trade Association has established standards for mattress sizes that includes allowable variances. Below is a detailed explanation of these standards.

Mattress Variation Standards

The chart below outlines mattress sizes as per industry standards with acceptable variance ranges.

Finished Mattress Sizing Variations

Mattress Size	Industry Standard Dimensions (+/-1/2")	Allowable Variance (Length & Width)	Min. Width	Min. Length
Twin	38" x 74.5"	-0.5"	37.5"	74"
Twin XL	38" x 79.5"	-0.5"	37.5"	79"
Full	53" x 74.5"	-0.5"	52.5"	74"
Queen	60" x 79.5"	-0.75"	59.25"	78.75"
King	76" x 79.5"	-0.75"	75.25"	78.75"
Cal King	72" x 83.5"	-0.75"	71.25"	82.75"

All dimensions are in inches.
Finished sizes are measured from outside to outside of tape edge at the centerlines of the width and length.
The distance is measured between extreme outside edges of finished construction.

A standard king-size mattress measures 76 inches wide by 80 inches long, making it one of the largest mattress options available. This generous size provides ample sleeping space for couples, allowing each person to have 38 inches of personal space. It’s also a great option for individuals who prefer extra room to stretch out or for families with pets. The king-size mattress is ideal for primary bedrooms or larger spaces, offering a luxurious and comfortable sleeping experience.

Rooms To Go offers a wide variety of king-size mattresses to meet diverse comfort and support needs. From premium brands like Tempur-Pedic and Beautyrest Black, known for their luxurious and innovative designs, to Sealy Serta, and Casper, there is a mattress to suit every preference. Additionally, our convenient mattress-in-a-box options are perfect for those who want an easy-to-transport and quick-to-set-up solution. Whether you prefer soft, firm, or medium comfort levels, there's a king-size mattress tailored to your sleep style.

Yes, a king-size mattress requires a bed designed to support its size and weight. Choosing the right frame is crucial to ensure stability and durability over time. At Rooms To Go, we offer a variety of options, including adjustable bases and frames which provide customizable comfort and allow you to adjust the bed's position for activities like reading, watching TV, or working in bed. Our stylish king beds come in various designs and materials to complement your bedroom décor while providing the necessary support for your mattress.

Yes, Rooms To Go offers flexible mattress financing options to make buying a king-size mattress more accessible. With low monthly payment plans, you can enjoy your new mattress without putting a strain on your budget. Our financing options are designed to fit a range of financial needs, ensuring everyone has the opportunity to invest in a great night's sleep. Additionally, don't miss out on our sales, where you can find exclusive deals and discounts to save even more on your purchase.

To maximize the comfort and longevity of your king-size mattress, it's important to pair it with the right accessories. King-size bedding not only adds style to your bedroom but also enhances the coziness of your sleeping space. Properly fitted king-size sheets ensure a snug and secure fit, while premium materials like cotton or microfiber add softness and breathability. For added protection and durability, consider using a mattress protector to shield against spills and allergens, extending the life of your investment.

Yes, it's recommended to use king-size pillows for a king-size bed to ensure a cohesive and proportionate look. King-size pillows are specifically designed to fit the width of a king mattress, measuring 20 inches by 36 inches each. When placed side by side, they span the width of the mattress, creating a polished and balanced appearance.

King-size pillows also provide additional comfort, offering more space to rest your head and shoulders. If you prefer multiple pillows for decorative purposes, standard or queen-size pillows can still be layered with king-size options to create a stylish and functional bedding arrangement. For the perfect fit, pair your king-size pillows with properly sized pillowcases or shams to enhance both comfort and aesthetics.

Yes, king-size mattresses are an excellent choice for couples because they provide ample room for both individuals to sleep comfortably without disturbing each other. With a width of 76 inches, each person has 38 inches of personal sleeping space, ensuring a restful night even for those who toss and turn. For couples seeking additional customization, a split king mattress is a great option, allowing each side to be adjusted independently. Alternatively, if you need more legroom, the California king mattress offers extra length while sacrificing a bit of width.

Yes, testing a mattress in-store is an essential step to finding the right one for your needs. At any Rooms To Go store, you can experience the feel, support, and comfort of various king-size mattress options firsthand. Our knowledgeable staff will guide you through the selection process, answering your questions and helping you choose the perfect mattress for your sleep style and budget. Visiting a store ensures that you make a confident and informed decision before bringing your new mattress home.

Mattress Size Reference Guide

An Industry Trade Association has established standards for mattress sizes that includes allowable variances. Below is a detailed explanation of these standards.

Mattress Variation Standards

The chart below outlines mattress sizes as per industry standards with acceptable variance ranges.

Finished Mattress Sizing Variations

Mattress Size	Industry Standard Dimensions (+/-1/2")	Allowable Variance (Length & Width)	Min. Width	Min. Length
Twin	38" x 74.5"	-0.5"	37.5"	74"
Twin XL	38" x 79.5"	-0.5"	37.5"	79"
Full	53" x 74.5"	-0.5"	52.5"	74"
Queen	60" x 79.5"	-0.75"	59.25"	78.75"
King	76" x 79.5"	-0.75"	75.25"	78.75"
Cal King	72" x 83.5"	-0.75"	71.25"	82.75"

All dimensions are in inches.
Finished sizes are measured from outside to outside of tape edge at the centerlines of the width and length.
The distance is measured between extreme outside edges of finished construction.

King Mattresses

King Mattresses

stearns and foster

Stearns and Foster Estate Firm Tight Top King Mattress (4.5)

tempur-pedic

Tempur-Pedic LuxeBreeze 2.0 Firm King Mattress (4.5)

beautyrest black

Beautyrest Black Hybrid Series Two Medium Apex Top King Mattress (4.6)

beautyrest black

Beautyrest Black Series Four Plush Summit Pillow Top King Mattress (4.7)

beautyrest black

Beautyrest Black Series Three Plush Pillow Top King Mattress (4.7)

beautyrest black

Beautyrest Black Series One Extra Firm King Mattress (4.5)

beautyrest black

Beautyrest Black Series One Medium King Mattress (4.7)

beautyrest world class

Beautyrest World Class Level Three Plush King Mattress (4.3)

beautyrest world class

Beautyrest World Class Level Three Medium Pillow Top King Mattress (3.8)

tempur-pedic

Tempur-Pedic LuxeBreeze 2.0 Soft King Mattress (4.3)

beautyrest world class

Beautyrest World Class Level Four Plush Pillow Top King Mattress

beautyrest black

Beautyrest Black Series Two Firm King Mattress (4.5)

beautyrest black

Beautyrest Black Series Three Medium Pillow Top King Mattress (4.7)

beautyrest black

Beautyrest Black Series Two Medium Pillow Top King Mattress (4.8)

beautyrest black

Beautyrest Black Series Three Firm Pillow Top King Mattress (4.6)

beautyrest black

Beautyrest Black Series Three Firm King Mattress (4.7)

casper

Casper Snow Max King Mattress (4.4)

casper

Casper Dream Max King Mattress (4.3)

tempur-pedic

Tempur-Pedic ProBreeze 2.0 Medium King Mattress (4.5)

tempur-pedic

Tempur-Pedic ProBreeze 2.0 Medium Hybrid King Mattress (4.5)

stearns and foster

Stearns and Foster Estate Firm Pillow Top King Mattress (3.9)

stearns and foster

Stearns and Foster Lux Estate Firm Pillow Top King Mattress (3.9)

posturepedic plus

Sealy Posturepedic Castle Rock King Mattress

stearns and foster

Stearns and Foster Lux Estate Extra Firm Tight Top King Mattress

Mattress Size Reference Guide

Mattress Variation Standards

Frequently Asked Questions About King Mattresses

Mattress Size Reference Guide

Mattress Variation Standards

Frequently Asked Questions About King Mattresses

Stearns and Foster Estate Firm Tight Top King Mattress
(4.5
)

Tempur-Pedic LuxeBreeze 2.0 Firm King Mattress
(4.5
)

Beautyrest Black Hybrid Series Two Medium Apex Top King Mattress
(4.6
)

Beautyrest Black Series Four Plush Summit Pillow Top King Mattress
(4.7
)

Beautyrest Black Series Three Plush Pillow Top King Mattress
(4.7
)

Beautyrest Black Series One Extra Firm King Mattress
(4.5
)

Beautyrest Black Series One Medium King Mattress
(4.7
)

Beautyrest World Class Level Three Plush King Mattress
(4.3
)

Beautyrest World Class Level Three Medium Pillow Top King Mattress
(3.8
)

Tempur-Pedic LuxeBreeze 2.0 Soft King Mattress
(4.3
)

Beautyrest Black Series Two Firm King Mattress
(4.5
)

Beautyrest Black Series Three Medium Pillow Top King Mattress
(4.7
)

Beautyrest Black Series Two Medium Pillow Top King Mattress
(4.8
)

Beautyrest Black Series Three Firm Pillow Top King Mattress
(4.6
)

Beautyrest Black Series Three Firm King Mattress
(4.7
)

Casper Snow Max King Mattress
(4.4
)

Casper Dream Max King Mattress
(4.3
)

Tempur-Pedic ProBreeze 2.0 Medium King Mattress
(4.5
)

Tempur-Pedic ProBreeze 2.0 Medium Hybrid King Mattress
(4.5
)

Stearns and Foster Estate Firm Pillow Top King Mattress
(3.9
)

Stearns and Foster Lux Estate Firm Pillow Top King Mattress
(3.9
)