Best Oversized Mattresses

Written by

Alison Deshong , Staff Writer, Product Testing Team

Reviewed by

Dr. Michael Breus, PhD, DABSM, FAASM , Clinical Psychologist, Sleep Medicine Expert
Expert tested
Every product undergoes rigorous testing with a variety of hands-on methods to give you the most accurate, unbiased reviews possible. Our methodology.
Updated Regularly
In light of recent tests, we've updated our list to include the Ace Family Size Mattress as our best pick for families. The Mattress Insider Alaskan King Mattress remains our best overall.

The Sleep Doctor independently selects the products we test. We may earn a commission if you make a purchase using the links on our site. Learn more.

No matter who’s sharing your bed, every person and furry friend needs enough room to stretch out and change sleep positions without disturbing their fellow co-sleepers. Though oversized mattresses are not as common as standard mattress sizes, they make bedtime much more comfortable for anyone co-sleeping with multiple people and pets.

Giant mattresses can range from a few inches to a few feet larger than a king or California king size bed. Although they’re helpful for co-sleepers, oversized beds can be harder to find and harder to set up. We’ll help you choose the best oversized mattress for your needs and provide tips on how to maneuver and care for a giant bed.

Best Overall

Mattress Insider Alaskan King Mattress


  • Type: Hybrid

  • Firmness: Medium Soft (4), Medium Firm (6)

  • Sizes: Alaskan King

  • Price Range: $6,999 – $6,999

  • Warranty: 10 Year, Limited


  • Highly durable hybrid construction
  • Customizable firmness
  • Reinforced perimeter offers very good edge support

Ideal For

  • Back and side sleepers
  • People who sleep hot
  • Co-sleepers looking for a square design

With its hybrid construction and customizable firmness, the Mattress Insider Alaskan King Mattress is one of the most versatile and durable oversized models available. The square Alaskan king size measures 108 inches in each direction, offering plenty of space for multiple co-sleepers and pets.

Sitting at 13.5 inches thick, the Mattress Insider Alaskan King Mattress features a flippable and modular design that lets you fine-tune the feel of the bed. The comfort system consists of 2 inches of gel-infused memory foam and a 2-inch layer of Talalay latex. Our testing team found that it offers a nice balance between moderate contouring and responsiveness. The memory foam side has a plush 1-inch quilted cotton cover, while the latex side features the same organic cotton but without the added quilting.

Beneath the comfort system sits a 1.5-inch transitional polyfoam layer followed by 6 inches of foam-encased pocketed coils. We found that the coiled core offered very good support all the way to the edge of the mattress. A final quarter-inch layer of dense support polyfoam provides added stability and support to the mattress.

The comfort system is flippable, letting sleepers choose between the plusher feel of the memory foam layer or the firmer and more responsive latex layer. The firmness level can be further customized by flipping the support core and having either the firm transitional polyfoam or extra firm base layer on top. The mattress’ zippered design ensures that the sections stay in place. Alternatively, you can choose to forgo the support core altogether and just place the comfort system on a flat surface.

Sleepers who like their mattress firm or extremely firm can omit the comfort system and sleep on either side of the support core. However, shoppers should note that the support core is shipped in two sections that must be zipped together, so there will be a small gap between the two sides. Additionally, you cannot order just the comfort system or the support core, so you should account for appropriate storage space if you don’t plan on using one of them.

The company’s Alaskan king bed ships for free anywhere in the contiguous U.S. Mattress Insider also ships to Alaska, Hawaii, U.S. territories, and Canada, but orders are subject to shipping fees. The mattress ships in three pieces, making it easier to maneuver into your bedroom. It’s protected by a 10-year limited warranty but doesn’t come with a sleep trial period.

While many oversized mattresses offer limited customization, the Alaskan King Mattress from Mattress Insider is a notable exception. Featuring a modular design with eight firmness variations, this durable bed lets co-sleepers customize each side of the expansive sleeping surface.

Best Luxury

Big Mattress Co. Oversized Mattresses


  • Type: Foam/Airbed

  • Firmness: Medium Firm (6)

  • Sizes: Wyoming King, Texas King, Vermont King, Family Bed, Alaskan King, Family Bed XL

  • Price Range: $2,799 – $4,799

  • Warranty: 10 Year, Limited


  • Six sizes to choose from
  • All-foam and airbed models available
  • 100-night sleep trial with free returns

Ideal For

  • Value seekers
  • Sleepers who enjoy the contouring feel of a foam mattress
  • Co-sleepers looking for an extra wide mattress

Big Mattress Co. offers one of the largest selections of oversized beds. The company’s lineup includes six oversized options: Alaskan king, Texas king, Vermont king, Wyoming king, family, and the extra wide family XL. With reasonable prices on their large beds and generous customer service policies, Big Mattress Co. mattresses represent an excellent value for oversized bed shoppers.

Big Mattress Co. offers two mattress models: the 11-inch Big Mattress Classic and the 13-inch Big Mattress Premier. The all-foam version of the Classic has a medium firm (6) feel, while the foam Premier has a medium (5) firmness level.

Both the Classic and Premier are available in airbed versions. While the company refers to them as hybrid options, they feature inflatable air pods that let owners control the firmness level via a dial on the side of the bed.

Our testers noted that both models are fairly versatile, providing a balance of pressure relief and support. Additionally, they observed that the polyfoam comfort system works to stifle motion and sound so co-sleepers don’t disturb one another during the night.

Big Mattress Co. beds are made to order. Each mattress ships for free and comes with a 100-night sleep trial and free returns. The company’s mattresses are also protected by a 10-year limited warranty.

Featuring an impressive array of oversized options available in two models with a choice of all-foam or airbed designs, Big Mattress Co. offers an appealing sleep solution for nearly every sleeper type. The company also sells bed frames and bedding designed to fit all of the company’s oversized mattress models.

Best for Families

Ace Family Size Mattress


  • Type: Hybrid

  • Firmness: Soft (3), Medium Firm (6)

  • Sizes: Family Size

  • Price Range: $4,500-$8,400 – $4,500-$8,400

  • Warranty: 10 Year, Limited


  • Foam comfort system contours to the body to relieve pressure
  • Gel infusions meant for cooling
  • Breathable bamboo-derived viscose cover

Ideal For

  • Hot sleepers
  • Families
  • Couples

Many mattresses can feel too small if you are spending time with a partner, kids, and pets simultaneously, but the Ace Family Size Mattress is designed with family time in mind. The generous-sized bed measures 144 inches wide, ensuring multiple people can rest comfortably. 

The Family Size Mattress comes in four models: regular, pillow-top, premium cotton, and premium natural. The regular model features a breathable bamboo-derived cover and polyfoam comfort system over robust pocketed coils. The pillow-top features the same construction but adds cooling gel-infused polyfoam sewn into a pillow-top cover for enhanced cooling and pressure relief. 

You can also opt for the premium cotton or premium natural models, both of which hold a higher price-point and are available for custom order. The cotton model is a hybrid with a tufted cotton comfort system over pocketed coils, and the natural model has a latex comfort system. 

Every model of the Family Size Mattress comes in two firmness levels: soft (3) and medium firm (6). The foam comfort systems in the regular and pillow-top models appealed to our side sleepers, who enjoyed the generous cushioning. Meanwhile, side sleepers who weigh at least 130 pounds, as well as back and stomach sleepers weighing up to 230 pounds enjoyed the two premium models. Regardless of mattress type, we recommend opting for the softest model if you weigh less than 130 pounds and the medium firm if you weigh up to 230 pounds. Side sleepers weighing more than 230 pounds also enjoyed the medium firm, but back and stomach sleepers with this body type may need a firmer mattress. 

All models regulate temperature well, thanks to steady airflow through the coils and breathable covers. However, the two premium models excelled in our temperature control tests. Breathable components like cotton, wool, and latex kept the surface cool, and we noticed little to no heat buildup. The mattress’ larger size is great for families, but we also found it great for couples seeking extra room. The pocketed coils give the surface a responsive feel that many couples may enjoy for sex. 

Ace Size ships free to customers in the contiguous U.S. You have 21 nights to test the mattress and return it, which will incur a 35% handling fee. If you decide to keep the Family Size Mattress, it is backed by a 10-year warranty. 

The Ace Family Size Mattress is extra wide to accommodate several family members, as well as pets. Our testers also enjoyed the choice between four designs and two firmness levels.

Why You Should Trust Us

At, our goal is to help readers make informed decisions to improve their sleep. Our team performs rigorous in-house testing on every product we feature in our reviews. The Sleep Doctor testing team includes a wide range of body types and sleep preferences for a diversity of opinions. We regularly update our product recommendations to account for new releases, testing results, and insights.

What Is an Oversized Mattress?

An oversized mattress refers to any bed that’s bigger than a king or California king, which are the largest standard mattress sizes. King mattresses measure 76 inches wide by 80 inches long, while California king beds are 72 inches wide by 84 inches long.

Some of the most common oversized options are square. These include the Wyoming king, Vermont king (which has the same dimensions as the Alberta king), and Alaskan king. A Texas king mattress is significantly longer than it is wide. Meanwhile, the family XL size has the same length as a California king but measures a whopping 144 inches in width.

Common Size Options for Oversized Mattresses

Wyoming King
Texas King
Vermont King
Alaskan King


84″ x 84″

80″ x 98″

96″ x 96″

108″ x 108″

Where Can You Buy an Oversized Mattress?

Oversized mattresses may be hard to find in many brick-and-mortar mattress shops but are available to buy online. Most in-person retailers only stock standard mattress sizes in their showrooms, since oversized mattresses are not as popular and take up a large amount of floor space.

How Much Does an Oversized Mattress Cost?

Oversized mattress prices vary widely depending on the size, mattress type, and brand, with lower-end models starting at $1,500 and luxury options approaching $10,000. The cost of special bedding and bed frames can also add to the final price.

How Easily Can You Find Sheets and Bed Frames for These Mattresses?

Oversized mattresses are a niche product, making it harder to find sleep accessories like bedding and bed frames. However, many retailers that offer oversized mattresses also make accessories to go along with their larger mattress sizes.

For more options, shoppers can try searching online to find other retailers selling oversized sleep accessories. A properly sized fitted sheet is the most important piece. While other custom bedding is available, sleepers can also use multiple standard top sheets, blankets, and comforters on an oversized mattress.

Oversized Mattress Types

Like standard mattresses, there are different types of oversized mattresses. Each mattress type uses a different combination of materials with a unique feel and performance. For an oversized mattress, it’s especially important that all of the bed’s sleepers feel comfortable and supported.

Hybrid Mattresses

Hybrid mattresses typically combine a thick foam comfort system with a pocketed coil support core. This combination gives hybrids the soft, contouring feel of a foam mattress with the resilient bounce of a traditional innerspring.

The coiled support core construction also provides superior durability. As a result, hybrid beds tend to last longer than many all-foam models.

Foam Mattresses

Foam beds are made entirely from foam layers, typically polyfoam or memory foam. The feel and performance of different foam formulations can vary substantially.

Memory foam mattresses feature a memory foam comfort system with a denser polyfoam support core. They tend to provide excellent contouring and pressure relief. Beds with a polyfoam comfort system can offer a wider range of firmness levels with a springier feel than memory foam.

A foam model can be an excellent choice for those planning to share their oversized bed with several sleepers and pets. This is because foam mattresses tend to be nearly silent with minimal motion transfer, meaning the movement of one sleeper is less likely to disturb others sharing the bed.

Innerspring Mattresses

Innerspring mattresses feature a thick support core of metal coils, a fabric cover, and minimal cushioning. With the industry moving toward foam and hybrid models, traditional innerspring beds are largely a relic of the past. However, some mattress makers use the terms innerspring and hybrid interchangeably.

When researching oversized mattresses, it’s important to understand the construction of each model. Side sleepers should be especially careful to ensure that any bed with springs provides adequate cushioning for their hips and shoulders.

What Do You Need From an Oversized Mattress?

An oversized mattress should provide the right level of support and cushioning for each sleeper’s body type and sleep style. A larger mattress should also have ample height and edge support to make it easy to get in and out of bed.


Mattress Thickness and Overall Height

The thickness of the mattress combined with the bed frame and foundation determine the overall bed height. A higher bed allows for more storage underneath. Sleepers who have trouble getting in and out of bed usually prefer a higher sleep surface.

Edge Support

Edge support refers to how well a bed supports your weight at its outer edges. Strong edge support makes it easier to get in and out of bed, which is important for sleepers with reduced mobility. Hybrids or foam beds with reinforced edges typically have the best edge support.

Contouring and Pressure Relief

The top comfort layers of your mattress provide cradling comfort to the curves of your body. The comfort system also helps relieve pressure from key areas like the hips and shoulders.

Remember to look at more than the dimensions when shopping for an oversized mattress. It’s important to make sure that the bed provides ample pressure relief, especially for side sleepers and people with back pain.

Firmness and Feel

Firmness describes how hard or soft a mattress feels on a scale from 1 to 10, with 10 being the firmest. Optimal firmness depends on several factors, including your body weight, preferred sleep position, and personal comfort preferences.

It’s important for co-sleepers to find a firmness level that works well for everyone. However, co-sleeping families may want to consider the needs of the adults more so than growing children.

Oversized Mattress Setup and Care

Setting up an oversized mattress requires more planning than a standard mattress. First, you’ll need to take measurements in your bedroom to confirm an oversized bed will fit in your sleep space.

After you place your order, you may need to take additional steps to prepare for delivery. Clear any clutter or bulky items in the path from your front door to your bedroom, and take measurements of your doorways and hallways to ensure there’s enough room to maneuver the mattress.

Consider the Mattress Weight, Mattress Type, and Movability

An oversized mattress can weigh upward of 200 pounds or more. With this in mind, you may want to recruit multiple people to help you transport the bed from your door to your bedroom. Some manufacturers ship their oversized beds in multiple pieces, which can make it easier to maneuver.

When your new mattress arrives, try to place the shipping box as close to your bed frame as possible before unboxing. Keep in mind that foam mattresses don’t hold their shape as well as hybrids or innersprings and may be more cumbersome to move after unboxing.

Proper Care for Your Giant Mattress

Mattress cleaning and care steps are the same for standard and oversized mattresses. However, you may need an extra pair of hands to make rotating the bed and changing the sheets a bit easier.

Most importantly, try to spot-clean spills right away to prevent stains from setting in. And consider searching for an oversized mattress protector to further protect and extend the life of your giant mattress.

About The Author

Alison Deshong

Staff Writer, Product Testing Team

Alison is a health writer with ample experience reading and interpreting academic, peer-reviewed research. Based in San Diego, she is published in the journal PLOS Genetics and the Journal of Biological Chemistry and has been a copywriter for SmartBug media. With a master’s degree in biochemistry from the University of California, Davis, she has nearly a decade of academic research experience in life sciences. She enjoys helping people cut through the noise to understand the bigger picture about sleep and health. Alison likes to stay active with rock climbing, hiking, and walking her dog.

  • Position: Stomach Sleeper
  • Temperature: Neutral Sleeper
  • Chronotype: Bear

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