The Ultimate Guide to Bed Size Charts: Find the Perfect Mattress Dimensions for Your Space

Choosing a mattress involves many important factors, such as quality materials, durable construction, your space, and, of course, comfort. But before all of those considerations comes mattress size. As the premier maker of locally handcrafted mattresses for nearly 40 years, Custom Comfort Mattress understands what goes into choosing a mattress size. As a California-made, family-owned mattress brand with local showrooms, we specialize in guiding sleepers toward the ideal fit. In this comprehensive guide, we leverage our experience to break down the basics and intricacies of mattress size and its impact on sleep quality, offering mattress dimensions, room fit guidance, and even custom sizing options. By the end, you’ll understand which mattress size is the right fit for your space and sleep style.

What Is a Bed Size Chart?

A bed size chart is your first step for comparing mattress dimensions at a glance. This essential reference tool lists the standard mattress sizes available in the United States, showing width and length in inches and centimeters, along with recommendations for ideal room sizes. 

Understanding bed dimensions not only helps you optimize your space but also impacts your sleep health. The right size bed supports proper sleep posture, allows for comfortable movement during sleep, and helps prevent feeling cramped – especially important for co-sleepers.

Custom Comfort Mattress knows that the right mattress lets you stretch out comfortably, change positions easily throughout the night, and wake up feeling refreshed, which is why we offer both standard sizes and custom builds tailored to your unique needs. Many of our handcrafted mattresses are available in our signature dual-sided construction, allowing you to flip and rotate your mattress for long-term durability and comfort.

Chart of Standard Bed Sizes Explained 

This handy mattress size chart lets you quickly compare standard bed dimensions for the most common mattress sizes in the US:

Mattress Size	Dimensions (W x L in Inches)	Dimensions (W x L in CM)	Best For	Minimum Recommended Room Size
Twin	38″ x 75″	96.5 x 190.5 cm	Children, Single Adults	7′ x 10′
Twin XL	38″ x 80″	96.5 x 203 cm	Tall Teens, Dorm Rooms	8′ x 10′
Full (Double)	54″ x 75″	137 x 190.5 cm	Solo Adults, Guest Rooms	10′ x 10′
Queen	60″ x 80″	152.5 x 203 cm	Couples, Primary Bedrooms	10′ x 10′
King	76″ x 80″	193 x 203 cm	Couples Who Need Space, Families	12′ x 12′
California King	72″ x 84″	183 x 213.5 cm	Tall Sleepers, Narrow Rooms	11′ x 13′

Let’s break down each size with the context you need to make the right choice.

Twin Mattress (38″ x 75″)

The twin mattress, also known as a single bed, is the smallest adult bed size. It’s a space-efficient choice for children, small apartments, studio living, loft beds, or bunk beds. While the length makes it less comfortable for adults over 6 feet tall, a twin maximizes available room size in smaller bedrooms and can work beautifully in a guest room or child’s bedroom with a minimum space of 7′ x 10′.

Explore our selection of Twin Mattresses to find the perfect fit for your space.

Twin XL Mattress (38″ x 80″)

The Twin XL adds 5 inches to a standard twin bed to better accommodate taller sleepers. It’s ideal for older children or teens, college dorm rooms, and single adults needing extra legroom.

Also of note: placing two Twin XL beds side-by-side creates a Split King bed, a popular choice for couples and adjustable bed frames. 

Our selection of Twin XL Mattresses is great for taller sleepers.

Full Mattress (Double Bed) (54″ x 75″)

Also called a double bed, a full mattress offers a significant increase in width compared to a twin. A full mattress works better for a sleeper seeking sleep space than a twin, but whose room size can’t accommodate a queen. While a double can technically fit two people, it’s not ideal for larger adults or long-term sleeping for couples.

Our Full Mattresses are ideal for single sleepers who want extra space. If you’re a tall single sleeper, we also offer the less common Full XL Mattress, which adds 5 inches of length to 54” by 80”.

Queen Mattress (60″ x 80″)

The queen is hands down the most popular mattress size in the United States, offering the perfect blend of space for two and compatibility with most modern bedrooms. Unlike 27 inches for full-size beds, the queen-size mattress offers 30 inches of width per person, enough for most couples to sleep comfortably without disturbing each other. The queen-size bed fits well in a 10′ x 10′ bedroom, with decent clearance for a dresser and nightstands.

Our extensive collection of Queen Mattresses is handcrafted for lasting comfort.

King Mattress (76″ x 80″)

If a queen offers enough space for two, the king mattress provides another level of sleeping luxury. Also called a standard or Eastern King, this is the widest bed size available in standard dimensions, equivalent to two Twin XLs side-by-side and offering 38 inches of width per person.

If your room is 12′ x 12′ or larger, a king is your choice for luxurious, undisturbed sleep. A quality king bed and frame are ideal for couples who prioritize maximum personal space, or who co-sleep with children or pets.

Browse our selection of King Mattresses for the ultimate in spacious sleep.

California King Mattress (72″ x 84″)

The California King mattress offers 4 additional inches of length compared to a standard King, making it ideal for tall sleepers. If you’re a tall sleeper or your bed will occupy a longer or narrower space, 11′ x 13′ or larger, the Cal King is your ideal choice.

Explore our California King Mattresses designed for tall sleepers and longer bedrooms.

How to Choose the Right Bed Size for Your Needs

Now that you know the facts and figures behind mattress size, let’s turn our attention to the three key lifestyle factors that should influence mattress choice. 

1. The Room Dimensions

Ensuring ample space around the perimeter of the bed is critical when choosing the right mattress size. To prevent your bedroom from feeling cramped, interior designers recommend leaving 24 to 30 inches of walking space around the bed. 

Don’t forget to account for windows, doors, and drawers when determining bed size and planning your bedroom layout.

2. The Sleepers Involved

Not only is the number of people sleeping in a bed important, but so are their sleep habits and body size. While single sleepers can be comfortable on a twin or full mattress, larger people or those who prefer room to stretch out can be better served by XL versions. Couples can be extremely comfortable on a queen mattress, but if space and sleep preferences permit or they prioritize more sleep space, investing in a King or Cal King mattress is the ideal choice.

A general rule of thumb for length is that the mattress should be at least six inches longer than the tallest person sleeping in the bed to allow for comfortable pillow placement and prevent your feet from hanging off the edge.

3. Mattress Type & Construction

The materials and construction of your mattress play a major role in comfort and support. Options like natural latex, breathable cotton, innerspring systems, and handcrafted dual-sided designs each offer unique benefits. Choosing the right construction ensures your mattress provides long-term comfort, regardless of the size you select.

Beyond the Basics: Specialty & Custom Mattress Sizes

While the standard seven sizes cover most needs, Custom Comfort Mattress specializes in providing personalized solutions for those who need something different. No request is too big or too small for you to enjoy the restful, quality sleep you deserve. We specialize in creating handcrafted custom solutions for unique mattress and bedding needs.

Full XL Mattress (54″ x 80″)

This size is the perfect upgrade for a single, tall sleeper. It maintains the 54-inch width of a full mattress but adds the 80-inch length of a queen or king. This is a common choice for specialty situations or those moving up from a Twin XL who want more room to spread out without committing to a queen.

Oversized Mattresses

For those who need more space than standard mattress sizes allow, Custom Comfort Mattress handcrafts a variety of oversize options, including popular choices like the Ultra King (84″ x 96″), Wyoming/Hollywood King (84″ x 84″), Texas King (98″ x 80″), and even larger formats such as family-style or Alaskan-style oversized builds for expansive primary suites. 

These specialty sizes are crafted to order in our Southern California workshop, using natural materials and our signature dual-sided construction to ensure long-lasting comfort. Whether you’re designing a luxurious statement bed or creating a shared sleep space for the whole family, we can tailor the exact dimensions and feel to your room and your lifestyle.

Custom Mattresses for Individual Comfort & Style

Our sleep consultants use in-depth insight and analysis into your individual needs to match you with the best sleep system for you and your partner. Whether you have a petite build or your partner is a bodybuilder, we can adjust each side of the bed to work well for both of you.

We offer split mattresses, such as the One & One Comfort Split option, on our larger sizes. This allows each person to choose their preferred mattress type and firmness. For an adjustable bed, a split configuration is often necessary to allow each side to operate independently. 

Custom Designs & Materials

We can tailor-make mattresses to suit your space and interior design needs. If you have an antique bed frame, a European-sized bed, or any non-standard dimensions, Custom Comfort Mattress can craft custom sizes to fit perfectly. You don’t have to settle for a gap between your mattress and your frame.

Even non-traditional shapes are within our reach. Whether you need a narrow, round, short, or heart-shaped mattress, our artisans have the skills and experience to bring your unique vision to life. We work with natural materials, including organic latex, breathable cotton, and supportive coil systems, to ensure your custom mattress delivers the same exceptional quality as our standard sizes.

Boats & RVs: Taking Comfort on the Road or Sea

RV mattress sizes are often truncated or rounded to fit the tight spaces of an RV or travel trailer. A common RV Queen might be 60″ x 75″ instead of the standard 80″ length. Unusual shapes and depths are no problem for our designers and artisans.

Whether you’re outfitting a yacht, sailboat, motorhome, or travel trailer, we can help with measurements and consult with you to ensure a perfect fit. We understand that marine and recreational vehicle sleeping spaces come with unique challenges, from tapered corners to curved walls. Take your comfort on the road or to the sea with a Custom Comfort Mattress designed specifically for your vessel or vehicle.

The Dual-Sided Difference

All Custom Comfort Mattress products feature our signature dual-sided design, allowing you to flip and rotate your mattress for long-term durability. This feature, often overlooked by mass-market brands, distributes wear evenly across both sides, significantly extending the life of your investment and maintaining consistent support for many years. Whether you choose a standard-size mattress or a custom-built one, you’ll benefit from this hallmark of quality craftsmanship and long-term value.

Which Bed Size Is Right for You? 

A bed size chart is a fantastic starting point for choosing a mattress size, but it only shows the numbers. Bed length and width must be considered in relation to the size of your room as well as the size, number, and sleep styles of the people using it. 

Of course, there is no substitute for testing mattress types and sizes before buying. And the experience is even better under the expert guidance of a sleep consultant at a Custom Comfort Mattress showroom. Their goal is to determine not only the right mattress size for you but the absolute best fit for your body and sleep style, whether that means a standard-size mattress or a made-to-order build.

Frequently Asked Questions

What’s the difference between a King and a California King?

A King mattress provides couples with maximum width at 76″ x 80″, making it ideal for large square rooms. A California King mattress measures 72″ x 84″, offering extra length for taller sleepers and fitting better in long, narrow rooms.

Is a Full the same as a Double?

A Full mattress and a Double mattress represent the exact same size at 54″ x 75″. “Full” is the modern term used by most mattress brands, while “Double” is simply the older name for the same standard dimensions.

What size bed is best for couples?

Most couples sleep comfortably on a Queen mattress (60″ x 80″), which provides 30″ of space per person. Couples wanting more room or reduced partner disturbance typically choose a King or California King mattress for additional width or length.

What’s the largest mattress available?

The largest standard mattress sizes are the King at 76″ x 80″ and the California King at 72″ x 84″. Beyond these, several oversized options exist—such as the Texas King, Wyoming King, and Alaskan King—and Custom Comfort Mattress can also handcraft fully custom or oversize mattresses that extend far beyond standard dimensions.

Can I order a custom mattress size?

Custom Comfort Mattress offers custom mattress sizes for unique needs, including antique bed frames, European dimensions, RVs, boats, and oversized primary suites. We also build split configurations and adjustable-friendly options tailored to couples with different comfort preferences.

What’s the difference between a single-sided and a dual-sided mattress?

A single-sided mattress is built to be used on only one sleep surface and should not be flipped. A dual-sided mattress, like every Custom Comfort Mattress, is designed to be flipped and rotated regularly, extending durability and maintaining consistent comfort.

Find Your Perfect Fit at Custom Comfort Mattress  

Our comprehensive bed size chart and guide contains all the measurements, room recommendations, and expert insights you need to make an informed decision about mattress size.

However, bed dimensions are only part of the equation. Handcrafted quality provides lasting comfort that goes far beyond dimensions alone. A supportive mattress, constructed of high-quality materials and selected under the expert guidance of a sleep consultant, makes a world of difference and stands the test of time. 

We invite you to visit one of our showroom locations to experience the Custom Comfort Mattress difference for yourself. Our sleep specialists will guide you through a personalized, no-obligation fitting, beginning with selecting the right pillow, which makes up 30% of your total sleep solution. Next, we will fit you for the remaining 70%, namely your mattress, based on your body’s unique support needs, preferred sleeping position, and specific comfort requirements.

Stop guessing about your comfort. Come in today and discover how Custom Comfort Mattress can transform your sleep.