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Different Mattress Sizes - Which One Do You Need?

Jimmy Graham

By Jimmy Graham
Published March 22, 2023

Nothing feels better than waking up after a good night’s sleep. You mattress plays a vital role in getting quality sleep. But sleeping on the wrong size mattress can inhibit a restful night. Learn how to choose the best size mattress for you and your family.

A Serta innerspring mattress on an upholstered platform bed.

What are the Dimensions of Mattresses?

A graphic showing the different sizes of common mattresses.

Along with price, the size of a mattress is a determining factor for purchasing. We commonly talk about twin, queen and king-size beds, but most of the time don’t really know exactly how big or small they really are. The graph below will give standard sizes for the most common mattresses.

How Many People Will My Mattress Fit?

A couple trying out mattresses in a furniture store.

 When thinking about a new mattress, knowing how many people will be sleeping on it is going to be the most important criteria. You certainly don’t want to buy a bed that is too small to sleep comfortably, nor do you want to buy one that is too large for your bedroom. In the following sections we’ll discuss the most popular mattress sizes.

Twin and Twin XL Mattresses

A twin mattress on a blue upholstered platform bed frame.

Twin beds are what most of us graduated to from our cribs. The bigger mattress size allows room for children to develop without outgrowing it in a brief time. Measuring approximately 38 inches wide by 75 inches long, twin mattresses are typically found in kid’s rooms, on bunk beds, as day beds and in small guest rooms. Twin XL mattresses are longer at 38 inches wide by 80 inches long and are usually found in dorm rooms. Twin size beds are designed to hold one person.

Queen Mattresses

A queen size hybrid mattress on a gray upholstered platform bed.

The most popular bed size today is the queen bed. A queen mattress measures 60 inches wide by 80 inches long and is available in all of the major formats: foam, hybrid, innerspring and air. Queen size beds are best for singles who like extra room, couples, or a person that has pets that want to sleep in the bed with them.

King Mattresses

A king size mattress on a beige upholstered platform bed frame.

King mattresses and beds are the largest popular mattress size sold. They are available in foam, hybrid, innerspring and air models. With a 76-inch wide by 80-inch-long measurement, it has plenty of room for couples who like a little extra room, children who like to snuggle with their parents, and room for larger pets. King beds will work best in a larger bedroom with room to move around the bed and it does not reduce the room's space.

California King Mattresses

A California king mattress on a gray upholstered platform bed.

While many people are familiar with king size mattresses, there is a lesser known but equally as large California king bed mattress. California kings are 4 inches less in width at 72 inches but 4 inches longer at 84 inches in length. California king mattresses are best for taller people or couples that have larger pets that will sleep at the foot of the bed. Like regular king beds, California kings do best in a large bedroom or space.

Bedding and Mattress Accessories

A queen bed with rust-colored comforter, sheets and patterned throw pillows.

Now that you have decided on a mattress, it’s time to get sheets and comforters to dress your bed. Bedding sets are an easy option as they can contain everything you need in an all-in-one pack, including sheets, comforter, and pillow shams. You can protect your mattress from perspiration, dead skin cells and accidental spills with a mattress cover. Covers also guard against dust, allergens and bed bugs. If you like a little extra padding on your mattress, consider a mattress topper. Placed on the top of the mattress, it adds pillow-like softness and can guard against wear and tear.

Frequently Asked Questions About Mattresses

Here are some commonly asked questions about mattress sizes.

Is a California king mattress bigger than a king?

Visually, a California king may seem larger than a king size mattress. That is due to the extra length that a California king has. But in reality, a King bed (76 inches W by 80 inches L) has 6,080 square inches of space. A California king (72 inches W by 84 inches L) has 6,048 square inches of space. What the king size mattress gives up in width, the California king add in length.

What is the ideal size mattress for a couple?

For an average size couple, a queen size bed may provide the sleeping space and comfort for a good night’s sleep. If more room is needed, or you need room for the kids to snuggle or a pet to nap, a king size mattress should be the choice.

What size bed should a 6-foot person get?

A person that is six feet tall should have at least a queen size mattress to rest on. A queen mattress is 80 inches in length, giving plenty of room so your feet don’t hang off the end of the bed. If taller than six feet, a California king, with 84 inches of length might be the choice for a restful sleep.

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