Bed Frame Dimensions Guide

Bed Frame Sizes Guide

Key Takeaways

  • Understanding Bed Frame Basics: Bed frames serve as the structure that surrounds and supports your mattress, keeping it lifted off the ground to remain clean and dry. They are available in various types, such as panel, platform, bunk beds, sleigh, and four-poster, and can be constructed using materials like wood or metal. It’s essential to choose the appropriate frame to ensure proper mattress support.
  • Selecting the Right Bed Frame Size: When choosing a bed frame, it’s crucial to consider the dimensions of your mattress and the available space in your room. Different bed frame sizes, such as twin, twin XL, full, queen, king, and California king, accommodate specific mattress measurements. Ensuring a proper fit helps prevent mattress sliding or awkward folding.
  • Types of Mattress Foundations: Depending on the type of mattress you have, you might need a specific type of foundation. Solid foundations typically use a series of slats to support the mattress, while adjustable bases have electric motors to adjust the bed’s positioning, providing various health benefits such as improved circulation and back pain relief.

When bringing home a new mattress, you want to make sure your bed frame can accommodate its size. If the frame is too big, it will leave large gaps on each side—causing the mattress to slide around. If the bed frame is too small, the mattress may fold or bend awkwardly—creating sagging and indentations.

To ensure your mattress remains in good condition and keeps supporting you correctly, you need the perfect fitting frame. This article outlines the different types of bed frames available and how to determine the size that’s right for you.

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What is a Bed Frame?

The bed frame is the structure that surrounds your mattress. This frame consists of a headboard, a footboard, and two side panels and is typically made of wood or metal. In most cases, a bed frame will have a base—either solid or slatted—that supports the mattress.

Bed frames keep the mattress lifted off the ground, where it can remain clean and dry. The correct frame and foundation will also ensure the mattress is supported correctly.

How to Find the Correct Bed Frame?

Choosing the right size bed frame is relatively straightforward. Bed frames are built to accommodate standard mattress dimensions, such as twin, twin XL, full, queen, king, and California king.

If you’re purchasing a new mattress and plan to use an existing frame, be sure to measure the frame first. If you’re selecting a frame for a mattress you already own, you can measure your mattress and add 2 to 5 inches to each side. By adding in the extra space, you can account for additional features that might come with the frame, such as upholstery or shelving. This measurement will give you a good idea of the size frame you need.

The following chart provides a quick overview of the most common mattress sizes and their measurements.

Standard Bed Frame Sizes

SizeMattress Measurements
Twin38 inches by 75 inches
Twin XL38 inches by 80 inches
Full54 inches by 75 inches
Queen60 inches by 80 inches
King76 inches by 80 inches
California King72 inches by 84 inches

Twin Size

A twin bed, also referred to as a single bed, measures 38 inches by 75 inches and fits a twin size mattress. These beds are ideal for children who have outgrown their toddler bed and need a little more space.

A twin size bed fits comfortably in a standard 11 foot by 12-foot bedroom and still leaves enough space for a play area or additional furniture.

Twin XL Size

Twin XL beds are 5 inches longer than a standard twin size mattress. These beds are perfect for growing teens or single adults who require more legroom. A twin XL size mattress works well in a college dorm room or a small apartment.

When purchasing a twin XL mattress, be sure the bed frame can accommodate the additional 5 inches in length.

Full Size

A full size bed, also referred to as a double bed, measures 54 inches by 75 inches and fits a full size mattress. These beds are 16 inches wider, making them ideal for teens and adults who prefer more room to stretch out. Full mattresses are also an excellent option for a guest bedroom or a small studio apartment.

Before purchasing a full size bed, be sure your bedroom can accommodate the additional width. We recommend the room size be at least 11 feet by 12 feet for a full bed. This will leave plenty of space to move around the bed.

Queen Size

Queen size beds measure 60 inches by 80 inches and accommodate a queen size mattress. Queen beds are a natural choice for most couples since they afford each person 30 inches of personal space. Single sleepers also enjoy the extra room a queen offers.

A queen size bed will fit comfortably in a standard 11 foot by 12-foot bedroom. However, when used in a master bedroom, queen beds may not fill out the room correctly.

King Size

Over time, couples may start to feel cramped on a queen size mattress. Upgrading to a king-size bed offers each person more personal space and can also accommodate families who prefer co-sleeping.

King size mattresses measure 76 inches by 80 inches, so these beds fit best in a master bedroom or a room that measures at least 13 feet by 13 feet. A king bed frame will add 5 extra inches to each side of the bed. So, before deciding to purchase a larger bed, be sure you have plenty of room for the mattress and the frame.

California King Size

A California king-size bed measures 72 inches by 84 inches—4 inches longer than a standard king mattress. The extra length makes them ideal for those over 6 feet tall.

Like king beds, Cal kings take up a lot of floor space. So, they fit best in a larger bedroom or a master bedroom.

Before purchasing a Cal king, be sure that your frame can accommodate the extra length. If you have a standard king size bed frame with a headboard and side panels, you may be able to add extension rails to the end of the bed for more length. But, if your king bed frame has a footboard attached, a California king size mattress may not fit properly.

Types of Bed Frames

Now that you are familiar with the standard bed frame dimensions, you can consider the style that will work best with your mattress and room decor. As you shop for a bed frame, keep in mind your personal preferences, the size of your bedroom, and your mattress type.


A panel frame is a basic bed frame, consisting of a headboard, footboard, and two side panels. These frames have slats of either wood or metal that support the mattress and the foundation.


A platform bed features a sturdy base designed to hold a mattress that does not require an additional foundation, such as a box spring. A platform bed can have either a solid wood base or a slatted base. Slats on a platform bed are typically no more than 2.75 inches apart to evenly support the mattress.

Bunk Beds

Bunk beds are ideal for a smaller bedroom. These frames consist of two to three twin or twin XL beds stacked on top of each other. Four pillars support the bunk bed, and a built-in safety rail prevents sleepers from falling off.

Like a bunk bed, a loft bed has a raised platform. But, instead of two mattresses, a loft bed has a small desk or seating area on the bottom.


A sleigh bed has a decorative, curved headboard and footboard that resembles a sled. Some have elaborate designs or exaggerated curves, while others may be more understated and simplistic. These frames are suitable for a master bedroom because they create a focal point in a large bedroom.

Four Poster

A four-poster bed frame consists of a standard headboard, footboard, and two side panels. But, on a four-poster, four tall columns extend the ceiling. Some four-poster beds feature a large rectangle panel or a canopy on top. Fabric can be attached to this panel—allowing it to drape down the sides for dramatic effect or more privacy.

Bed Frame Materials

Most bed frames are made of wood or metal. Some headboards and footboards may be covered in upholstery to change the look of the bed.


Most bed frames are made of wood. However, the quality of the wood can vary from brand to brand. Solid wood provides the most stability and tends to be more durable. But, these frames can be heavy and awkward to move.

Most panel and platform bed frames use particleboard to create a frame that is lightweight but still durable. Particle board consists of pieces of recycled wood that are glued and pressed together to form a wood panel. This panel is then covered with vinyl to give it the look and feel of solid wood. Although a particleboard frame is not as durable as solid wood, it is lightweight, easy to move, and inexpensive.


Like wood, metal bed frames are durable and supportive. However, metal frames may not be as sturdy as wood and can bend or break over time.

Mattress Foundations

To support your mattress correctly, make sure it is resting on the right foundation. Many bed frames, such as a panel or a platform bed, have the support base built into the frame. But, if your frame doesn’t have a support base—whether slatted or solid—you will want to add one to your frame.

Most high-quality memory foam, latex foam, and hybrid mattresses no longer need a box spring foundation. These beds can be placed directly on the frame (as long as slats are no more than 2.75 inches apart) or on a solid or adjustable base.

Solid and adjustable foundations can be used as a stand-alone base or paired with most modern bed frames.

Solid Foundation

Since more advanced mattresses do not require a box spring, these beds can be placed on a solid foundation. A solid foundation consists of a wood box covered in cloth. A series of wooden slats are placed flat inside the box to support the mattress. Slats are usually covered in sturdy material to keep them from sliding apart.

Our Zoma Foundation is the ideal base for any mattress, not just an excellent foundation for a memory foam mattress. It features a sturdy pine wood box and slats. These slats are wrapped in a breathable, no-slip fabric to increase airflow and to keep slats firmly in place.

This foundation can be assembled in minutes and requires no tools. In just five easy steps, you are ready to place your mattress on top and start getting a better night’s sleep.

The Zoma Foundation comes with legs to create a stand-alone base. With the legs, the foundation stands 14.5 inches tall. You can also remove the legs and place the foundation directly on the floor.

Adjustable Base

An adjustable base has an electric motor that allows you to raise and lower the top and bottom portion of the bed. The articulation of an adjustable bed offers a host of health benefits—including better circulation, reduced snoring, and back pain relief.

Our Zoma Adjustable Bed allows you to find the most comfortable sleep possible with the touch of a button. Using the wireless remote, you can adjust the bed to find the angle that is right for you. Once you find the perfect position, you can save it as one of the preset options, so it’s easy to find your favorite settings each night. Plus, this base has a whisper-quiet motor that allows you to adjust the bed without waking your spouse.

This base is versatile enough to fit most modern bed frames. With the legs removed, it can sit comfortably on a slatted or solid foundation. With legs, The Zoma Adjustable Bed acts as a stand-alone frame.

At Zoma, we offer a 10-warranty on the adjustable base. You can also bundle this frame with the Zoma Mattress and save $200 on the mattress.

Frequently Asked Questions

What is the standard bed frame height?

The height of a bed frame ranges between 8 inches and 18 inches. Some frames come with adjustable legs that allow you to raise or lower the foundation.

The height of the frame will affect your ability to get in and out of bed. As you shop, be sure to select a height that fits your needs. If the foundation is too high, you may need a step stool to get into bed. If the frame is too low, you will have to squat to get out of bed in the morning.

Should the bed frame be bigger than the mattress?

The size of your bed frame should match the size of your mattress. For example, a king-size mattress should be placed on a king bed frame. If the bed frame is too big, there will be gaps on the side of the mattress. If the frame is too small, the mattress may bend or fold, which could cause sagging.

Did We Help?

The right bed frame can become the focal point of any bedroom. Whether you prefer a sleek, low profile design, or a dramatic look, you are sure to find a frame that suits your needs. Above all, your new bed frame should support your mattress correctly, so you can find the best sleep possible.


This article is for informational purposes and should not replace advice from your doctor or other medical professional.

Sarah Anderson, Certified Sleep Science Coach Sarah Anderson

Sarah Anderson is a sleep, health, and wellness writer and product reviewer. She has written articles on changing and improving your sleep schedule, choosing the right mattress for chronic pain conditions, and finding the best pillow for you. Sarah Anderson has her Bachelor of Arts degree from Arizona State University in Journalism and Mass Communications. Prior to working for Zoma, she wrote for a variety of news publications. Sarah's work has been featured on Bustle, PureWow, and other publications.

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Comments ( 5 )

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  1. Hi, this article is good. But, I am looking for information on how to measure the bed frame? End to End or the inner rectangle or the outer dimensions? My frame is an older model and has some amount of metal part extending beyond the inner rectangle. Thanks!

  2. You are a great writer. I like the way you present it. Surely, it helps a lot. Thanks for this and keep writing.

  3. Good article, informative. I will be attaching my two iron Twin XL bed frames with wood and drawers and this article is helpful. I have all the wood I need to do the above and make a really nice headboard and footboard.
    Thank you

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