Mattress Size Guide

Last Updated on August 2, 2020

by Marc Werner, Founder - Ghostbed

Mattress Size Guide

Use this mattress dimension guide to find your perfect fit.

So it is time for a new mattress and perhaps also time for you to rethink the mattress size that you want. No longer are there just the basic twin, full, queen and king, there are also a couple of more choices of mattress sizes added to the mix and confusion. Prior to shopping for the perfect bed it is important to analyze specific wants, needs and size of area that the mattress will be making home.

Width Length Height
Twin 38" 75" 11"
Twin XL 38" 80" 11"
Double 54" 75" 11"
Queen 60" 80" 11"
King 76" 80" 11"
Cal King 72" 84" 11"

When choosing your new mattress, be aware of the size of the room that you will be placing it in. Measure your room and furnishings and plot on graph paper your floor plan with doors and windows. Make sure that the King size bed that you are dreaming about will comfortably fit in with your furnishings.

GhostBed Mattress Size Guide

Twin Mattress Dimensions – 38” x 75” (inches)

The twin size mattress is usually the perfect bed for the child to young adult. At 38-inches wide by 75-inches long this compact sized mattress will sleep one person comfortably. Often two twin beds are used in rooms that siblings share. This is also the common size of mattress for a lovely day bed in a guest room as well.

Room Size: The recommended size for a Twin bed can vary from 7 feet by 10 feet or up a minimum size 9 feet by 9 feet depending on how much furniture you have and how much walking room you want around the bed.

Twin XL Mattress Dimensions – 38” x 80” (inches)

The extra-long, XL, twin size bed is more commonly known for being used in dorm rooms. This 38-inches wide by 80-inches long mattress adds a few inches to the more common twin size in order for a taller adult to sleep comfortably. It should also be noted that two XL twin beds placed together are approximately the same size as the common King size bed. This is perfect for mates who want to sleep together but prefer different types of mattresses.

Room Size: The recommended size for a Twin XL bed can vary from 8 feet by 10 feet or a minimum size 9 feet by 9 feet depending on how much furniture you have and how much walking room you want around the bed.

Double Mattress Dimensions – 54” x 74” (inches)

Double size mattresses are often referred to as double beds. These mattresses that are 54-inches wide by 74-inches long work well for one person but can fit two cozily for smaller sized rooms. Often this is a good transition mattress to update a child’s room to a more adult themed décor as the young one reaches high school age.

Room Size: The recommended size for a Double bed can vary from 9 feet by 10 feet or up to 10 feet by 12 feet depending on how much furniture you have and how much walking room you want around the bed.

Queen Mattress Dimensions – 60” x 80” (inches)

The Queen sized bed, at 60-inches wide by 80-inches long, is a most popular sized mattress for its ability to sleep two mates together comfortable as well as being able to fit into most room sizes. This mattress has become so popular that many also opt to use it in a child’s room that is on the larger size.

Room Size: The recommended size for a Quuen bed can vary from 10 feet by 10 feet or up to 10 feet by 14 feet depending on how much furniture you have and how much walking room you want around the bed.

King Mattress Dimensions – 76” x 80” (inches)

Traditional Size

If you like your space when sleeping next to a mate, then opt for the 76-inches wide by 80-inches long King Bed. You will want to make sure that your room’s dimensions will accommodate this larger bed size. For those who opt for this bed and need a traditional foundation, note that two split box springs are used in order to allow them to be moved more easily around tight hallways and stairs. This is also a great sized bed for those inviting the pets and kids in to sleep or to just enjoy a Sunday morning tradition of family bed time.

Room Size: The recommended size for a King bed can vary from 13 feet by 13 feet or up to 13 feet by 19 feet depending on how much furniture you have and how much walking room you want around the bed.

Cal King Mattress Dimensions – 72” x 84” (inches)

Longer but narrow

Slightly narrower and a bit longer than the traditional King bed, the California King bed is gaining popularity. This 72-inches wide by 84-inches long bed is perfect for taller people who could use a longer bed to sleep more restfully. As adjustable bases have grown in acceptance, for more than those needing a hospital type bed, this size mattress has become a common mate with its extra length allowing for head and feet to be elevated comfortably.

Room Size: The recommended ideal size for a Cal King bed can vary from 10 feet by 12 feet or up to 13 feet by 19 feet depending on how much furniture you have and how much walking room you want around the bed.


Marc Werner - Founder, GhostBed

Marc Werner

Founder - GhostBed

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After undergoing three neck surgeries, Marc knew what it was like to live and sleep in constant pain. In 2001, after searching fruitlessly for a comfortable pillow and mattress that supported his neck and back ... Learn More

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