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Bed Frame Sizes and Dimensions Guide 

Lara Vargas


Bed frames are a type of furniture used to support a mattress and lift it up off of the floor. They consist of two side rails and slats across the bottom to hold the mattress. Sometimes, they will also have a headboard and/or a footboard.

Using a bed frame offers several benefits for sleepers including greater support, added storage space, pest prevention, and aesthetic appeal. They come in a variety of different materials and styles to match the interior of your home—wood, metal, wrought iron, and upholstered, to name a few.

In this article, we will go over the most popular types of bed frames, covering key information about each to help you choose the correct type for your mattress, budget, and style.

Bed Frame SizeDimensions (Inches)Dimensions (CM)
Twin38 inches by 74 inches96.5 cm by 187.9 cm
Twin XL38 inches by 80 inches96.5 cm by 203.5 cm
Full54 inches by 75 inches134.5 cm by 190.5 cm
Queen60 inches by 80 inches152.5 cm by 203.5 cm
King76 inches by 80 inches193 cm by 203.5 cm
California King72 inches by 84 inches183 cm by 213.5 cm

Bed Frame Sizes

Bed frames are available in the six standard mattress sizes. However, depending on their style, some frames may extend out a few inches further than the mattress itself. And those extra inches can impact how a bed frame fits in your bedroom (or IF it fits in your bedroom). Therefore, we recommend always checking the frame’s exact dimensions before purchasing.

Below, we share the exact measurements of each mattress size so you can best determine what type of bed frame to purchase.

Twin Size Bed Frame

Dimensions: 38 inches by 75 inches

A twin mattress is the smallest of all bed sizes, making it a good choice for toddlers and children. They may work for single adults who don’t need a lot of legroom, have limited space, or are shopping on a tight budget.

Twin mattresses are often seen in small guest bedrooms, children’s rooms, and/or paired with bunk beds, Murphy beds, or daybeds.

Bedrooms measuring 9 feet by 9 feet are big enough to fit a twin size bed frame.

Twin XL Size Bed Frame

Dimensions: 38 inches by 80 inches

Like a twin size bed, a twin XL is suitable for solo sleepers, but with its extra 5 inches of length, it’s a better option for teenagers and single adults who are taller than 6 feet. This is one reason why twin XLs are the go-to mattress size for dorm rooms and college apartments. Twin XL mattresses may be a more comfortable option than the twin for growing children, as well, due to their added legroom.

The recommended bedroom dimensions for a twin XL bed frame is 9 feet by 10 feet. This size requires a bit of extra length since it is longer than a twin.

Full Size Bed Frame

Dimensions: 54 inches by 75 inches

Also referred to as a double mattress, full size beds offer plenty of room for single sleepers, particularly children, teenagers, and single adults. While full mattresses are not as long as twin XLs and larger mattress sizes, like queens and kings, their 54-inch width offers a lot of wiggle room for sleepers who want space to stretch.

For couples, full sized beds can be used temporarily; but considering they only offer 27 inches of room for either sleeper, they’ll probably feel cramped and uncomfortable. Typically, the best mattresses for couples are queens and split kings since they allow more room on each side of the bed.

In order to fit a full size mattress comfortably in a room, the space should be larger than 9 feet wide and 10 feet long.

Queen Size Bed Frame

Dimensions: 60 inches by 80 inches

Queen mattresses are the most popular size beds in the United States because their roominess is loved by single sleepers and their affordability and versatility are perfect for most couples. Queen beds provide adequate space for two sleepers, but they’re not overly-large, so they can fit in guest bedrooms, kids’ rooms, and other sleeping spaces without taking up quite as much floor space as kings or California kings.

Generally, queens fit best in bedrooms larger than 10 feet by 10 feet.

King Size Bed Frame

Dimensions: 76 inches by 80 inches

Kings, specifically Eastern kings, are the widest of all standard mattress sizes. King mattresses give sleepers ample room during the night, and they’re ideal for couples because they equal the same dimensions of two twin XL beds placed together. While yes, that means king beds offer a lot of room, this also means couples with very different sleep needs can choose a split king size to customize the mattress model they want for their side of the bed. (No more comfort compromises!)

As you might imagine, a spacious king mattress requires a big bedroom to fit comfortably—we recommend a 12 foot by 12-foot room at a minimum.

California King Size Bed Frame

Dimensions: 72 inches by 84 inches

California king mattresses, or Western kings, are the longest of all beds. While they’re 4 inches narrower than standard king size mattresses, they have four extra inches of legroom to accommodate super-tall sleepers. Even though the Cal king is often thought of as the most luxurious mattress size, it’s really just a king variation for sleepers whose feet tend to dangle off the end of the bed. You can decide between a king and Cal king by asking yourself if you prefer wiggle room or legroom—if you like space to sprawl, choose a king, but if you need legroom to stretch out, choose a Cal king.

A California King bed should only be used in a room greater than 12 feet by 12 feet. Otherwise, it will feel quite tight in the space due to its length.

Types of Bed Frames

Bed frames vary in size, storage space, support level, look, and cost. These are the most popular types available on the market and their defining characteristics:

Platform Bed Frame Size

A platform bed frame is a versatile, simple, and affordable choice for budget-conscious shoppers. These frames are low profile and provide adequate support for all types of mattresses.

Platform frames come in many different variations, making them easy to match to a room’s existing decor. Some have headboards while others do not, for instance. They may even contain storage drawers underneath which can be useful for small spaces with limited room. This type of bed frame is available in various different materials, but a wood platform bed is an ideal choice for sleepers because of its high level of durability. Solid wood will provide sturdy comfort and is built to last for many years.

Individuals who suffer from back or leg pain may struggle with the bed height of a platform bed frame, however. Getting in and out of the bed could prove difficult, and possibly even painful for them—this is one important drawback to consider when choosing a frame.

Adjustable Beds

Adjustable beds offer individuals customizable support. These motorized frames are powered by using a remote to adjust the bed to your desired comfort. This function allows sleepers to raise or lower their feet and/or head accordingly.

Since elevation promotes circulation and reduces swelling, sleepers with certain health conditions may benefit greatly from having an adjustable bed. Another perk of using an adjustable bed base is the targeted back support—sleepers are able to choose an angle to best fit the natural curvature of their body.

One possible downside to adjustable beds is their high cost. Given their sophisticated technology, they tend to be a more costly bed frame choice compared to the others listed in this article, and this might be off-putting or unrealistic for consumers sticking to a tight budget.

Four Poster

A four-poster bed, also commonly called a canopy bed, contains four vertical columns to support an upper rail. These rails are eye-catching, making the four-poster bed frame a decorative statement piece in many bedrooms.

These luxurious-looking frames are quite functional—the rails allow sleepers to hang curtains around the bed, providing extra privacy and darkness. Curtains can also add a touch of warmth by preventing draft air from reaching the sleeper(s).

Four-poster beds are typically made of solid wood, making them prized for their longevity. The frames’ pillars make them quite tall, however. Before bringing this type of frame home, one should check to make sure there is at least one foot between the top of the rail and the ceiling.

Due to their tall height, they don’t make the best choice for small spaces or homes/apartments with low ceilings.

Mattress Foundation

A mattress foundation provides solid support for a mattress. This type of bed frame consists of a wooden box with four legs to prop up the bed frame and wooden slats across it. As a general rule of thumb, the smaller the space between the wooden slats, the more support your mattress will have. Ideally, they should be about 2 to 2.75 inches apart.

Oftentimes, mattress foundations will be covered in a breathable fabric, and possibly even light padding. They lack a headboard or footboard, however.

Mattress foundations are designed specifically for support, and the sturdiness of some may cause a mattress to feel firmer than other types of bed frames. For sleepers who are seeking more cushioned comfort and movement in their frame, a foundation may not be the best choice.

Sleigh Bed

Sleigh beds resemble a sleigh, hence the name. This type of bed frame displays outwardly curved feet and a headboard. Sleepers with a refined style may be drawn to their opulent look.

While elegant in appearance, sleigh beds are not the most practical base for a bed; they tend to be quite large as far as frames go and as a result, will require a large space to properly accommodate them.

One other downside to a sleigh bed is its limited size for tall sleepers—the footboard could easily cause their legs to feel cramped.

Bunk Beds

Bunk beds consist of multiple, usually two or three, bed frames, with one directly on top of the other. They are supported by four pillars, one at each corner of the bed. The top frame will usually have a railing around it to prevent the sleeper from falling off.

A bunk bed is a practical bed frame option for those with limited room and/or two children sharing a bedroom. They are only available in twin and full sizes, but their stacked style makes them great for space-saving style and versatility.

As for cons, bunk beds can be dangerous for young children. We only recommend using them for kids aged 6 and up who can safely climb up the steps of a ladder.

Murphy Beds

Murphy beds fold up into a wall cabinet, saving you space during the day. Like bunk beds, Murphy beds are a great option for people with a limited amount of room space. There are two different potential configurations, with horizontal beds flipping up into the wall sideways while vertical Murphy beds fold up longways.

For a thorough list of potential Murphy bed dimensions, see our Murphy Bed Sizes and Dimensions Guide.


Does a bed frame make a difference in comfort?

Bed frames can make a big difference for sleepers in terms of comfort and sleep quality. They minimize motion transfer and provide balanced support for the mattress, preventing it from sagging in the center. Different types of bed frames may also affect how firm a bed feels; a mattress placed on a solid foundation, for example, will typically feel firmer than one on a slatted poster frame would.

What are the advantages of having a bed frame?

One of the major advantages to using a bed frame is the prevention of mold, mildew and/or insect infestation. When a mattress is placed on the floor, there is no room for dampness to escape. As a result, it becomes trapped beneath the bed, creating the perfect atmosphere for pests and molds. By elevating the bed, sleepers can easily eliminate this issue.

Using a bed frame offers several other benefits, too, including support for your mattress and extra storage space beneath the bed.

Can you sleep without a bed frame?

While technically, yes, you can, we don’t recommend using a mattress directly on the floor. Keeping your mattress up off the ground will prevent dust from gathering under it. Additionally, it reduces the chances of dealing with pests such as bed bugs, dust mites, spiders, and/or ants.

When a mattress is on the floor, there is no airflow beneath it which can trap heat and moisture between the mattress and the ground, and this may cause mold to settle into the bed itself.

Are wood or metal bed frames better?

Wood and metal bed frames each have their pros and cons. Therefore, the answer to this will depend on a couple of different factors including cost, durability, and style preference.

Metal bed frames tend to be less expensive than wood ones, so if cost is a major factor in your decision, you may lean toward metal. Metal frames offer a modern, sleek look and are highly durable. However, if the metals’ sealant is damaged or defective, it may be prone to rust.

Wood bed frames provide the highest amount of sturdiness and support, but this usually comes at a higher cost. Their classic, timeless look can be very appealing. With wood, however, there is always the chance of rotting over time.

What is the standard height of a bed frame?

There is no standard height when it comes to bed frames. They will range widely depending on the type. For instance, a low profile platform bed can be raised a few inches off the floor, whereas a four-poster bed might be as tall as 7 feet.


At the end of the day, the best bed frame for you will come down to personal preference. With so many different options available, there’s sure to be one suited to your individual comfort needs and style.

When shopping, determine what’s most important to you whether that be style, cost, or storage space, and always keep the size of your bedroom in mind to be sure it’s a good fit. Once you choose the right frame, you’ll enjoy greater support, and therefore comfort, for many nights to come.

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