Ideas + Advice


Mattress Size Guide

How do you choose the right mattress size for you? Well, the major determining factor is how much space you have in your bedroom.

Sure, Eastern King/King mattresses and California King mattresses are expansive and irresistible, but if you don’t have the space, you don’t want to make a mistake.

— Mattress Size Chart —

Mattress SizeDimensions
Twin Mattress 39"W x 75"L
Twin XL Mattress 39"W x 80"L
Full Mattress 54"W x 75"L
Queen Mattress 60"W x 80"L
Eastern King Mattress 76"W x 80"L
California King Mattress 72"W x 84"L

Step 1: Measure Your Bedroom

Finding out the length and width of your space will help you rule out mattress sizes that are going to be too big or too small for your bedroom. So get that measuring tape out pronto.

Step 2: Know Your Mattress Size Options

To better understand mattress sizes, we’ve grouped them together by small, medium and large options. Much easier, right?

— Small Mattress Sizes —

Twin mattresses are not all the same size! While the standard Twin (Single) is the smallest at 39x75, the Twin XL elongates the bed by 5 inches, clocking in at 80" in length.

What Size is a Twin Mattress?

Twin size mattress dimensions are 39 inches wide by 75 inches long. As the smallest mattress size you’ll find, a twin mattress is the best option for kids bedrooms and small guest rooms. You can even double them up if you need to sleep more than one person in a room, and you can use twin mattresses on most bunk beds and daybeds.

What Size in a Twin XL Mattress?

Twin XL size mattress dimensions are 39 inches wide by 80 inches long. Those extra five inches in length make a Twin XL mattress perfect for growing teenagers and college students. In fact, Twin XL mattresses are what you’ll find in most college dorms.

What Is the Difference Between a Twin and a Twin XL?

About 5", to be exact. The Twin XL simply adds a few inches in length and is designed for taller children and single adults. While the Twin can be found more often in modern children's bedrooms, the XL is standard in college dorms. Both, however, have the same width: about 39". To summarize: children tend to fare best with Twins, and if you're taller, sleep alone, and don't need a lot of width, you're best off with a Twin XL. 

— Medium Mattress Sizes —

What Size is a Full Mattress?

Full size mattress dimensions are 54 inches wide by 75 inches long. Perfect for when your children reach an age when they need more space, a full mattress will offer just enough room for them to spread out. Full size mattresses are also ideal for guest rooms, as they are comfy for one person and cozy for two people.

What Size is a Queen Mattress?

Queen size mattress dimensions are 60 inches wide by 80 inches long. By far the most popular of all the mattress size options, queen mattresses are that perfect balance of not too big, not too small, so they work well in a variety of bedrooms - whether it’s a master suite, a guest room or a growing child’s space.

— Large Mattress Sizes —

What Size is a King or Eastern King Mattress?

Eastern King/King mattress dimensions are 76 inches wide by 80 inches long. As the widest mattress size option available, it is extra spacious and luxurious. Eastern King mattresses and standard King mattresses are the same, and they are best for those who want to spread out while they’re sleeping.

What Size is a California King Mattress?

California King mattress dimensions are 72 inches wide by 84 inches long. The best option for anyone who’s tall or prefers having more space to stretch out, California King mattresses are the longest size mattress. Fun fact: California King mattresses were originally introduced in the 1960s exclusively for stars and athletes.

Step 3: Make Sure Your Mattress, Foundation and Bed Frame are the Same Size

Lastly and most importantly, be sure your mattress is the same size as your foundation and bed frame. All of these components must be the same size in order for you to have a seamless sleeping experience.

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Editorial Disclaimer: Articles featuring tips and advice are intended for educational purposes and only as general recommendations. Always practice personal discretion when using and caring for furniture, decor and related items.