Mattress Sizes and Dimensions
Our mattress size guide outlines the different sizes of beds and their dimensions to help you find the bed size that will serve your bedroom needs best
Which Mattress Size Should You Buy?
King Mattress Size
Dimensions: 76” x 80”Shop King MattressesA King size mattress measures 76 inches wide and 80 inches long (193.04 cm x 203.02 cm). Offering expansive space, it's ideal for couples and perfect for families that may share the bed with children or pets.
Considering different mattress sizes? Compare King vs Queen, King vs Cal King, King vs Split King.
Ready to buy? Explore our collection of King size mattresses, bed frames, and mattress sets.
Best For
Couples who appreciate ample space or for sharing the bed comfortably with children or pets.
Room Size
The optimal room size for a King size bed is between 13 feet by 13 feet and 13 feet by 19 feet, a great choice for master bedrooms or the primary bedroom in a home.
California King Mattress Size
Dimensions: 72” x 84”Shop MattressA California King size mattress is 72 inches wide and 84 inches long (182.88 cm x 213.36 cm). California King size mattresses are best for individuals or couples taller than 6 feet. A Cal king mattress is also a great choice for pet parents whose pets like to snuggle with them.
Best For
Tall people who love to have enough legroom and maybe have a pet join them.
Room Size
A long but narrow bedroom, 10 feet by 12 feet up to 13 feet by 19 feet, can hold a California King bed.
Queen Size Mattress
Dimensions: 60” x 80”Shop Queen MattressesThe Queen mattress, the most popular size, measures 60 inches in width and 80 inches in length (152.4 cm x 203.02 cm). Offering the perfect balance of comfort and a compact footprint, it provides ample space for couples or anyone who appreciates extra room to move around.
Discover how the Queen mattress measures up against other sizes by reading our guides on Queen vs King, Queen vs Cal King, Queen vs Full.
Ready to purchase? Browse our collection of Queen size mattresses in memory foam and hybrid options. Complete your setup with our high-quality bed frames and essential bedding.
Best For
Ideal for couples or individuals seeking extra space.
Room Size
For a comfortable fit, recommended room dimensions range from 10 feet by 10 feet to 10 feet by 14 feet. This allows ample space for moving around the bed, as well as accommodating dressers and side tables.
Full Mattress Size
Dimensions: 54” x 75”Shop Full MattressesA Full-size mattress, also known as a double bed, measures 54 inches in width and 75 inches in length (137.16 cm x 190.5 cm). Slightly smaller than a Queen, it's 5 inches shorter and 6 inches narrower, making it an ideal choice for single sleepers.
A Full bed provides ample comfort without taking up too much room, making it an excellent choice for smaller living spaces. To determine if a Full size mattress suits your needs, compare it with other sizes: Full vs Queen, Full vs Twin XL, Full vs King.
If you're ready to upgrade your mattress, explore our selection of Full-size memory foam and hybrid mattresses, bed frames and essential bedding to complete your bedroom setup.
Best For
Singles, young adults, and teens who need more space than a twin bed provides.
Room Size
A Full-size mattress fits well in rooms that measure at least 9 feet by 9.6 feet. It's an excellent option for guest rooms, dormitories, or studio apartments, where space is at a premium.
Twin XL Mattress Size
Dimensions: 38” x 80”Shop MattressA Twin XL mattress is 38 inches wide and 80 inches long (96.52 cm x 203.2 cm). A Twin XL is 5 inches longer than a Twin size mattress. A Twin XL mattress is the best choice for fast-growing teens or adults who prefer compact sleeping spaces. It’s not just a Twin XL mattress that fits your growing adults; there are others too, hence compare it to other mattress sizes: Twin XL vs Full, Twin XL vs Queen, Twin XL vs Twin.
Best For
Young children up to 12 years old, young adults, and college dorm rooms.
Room Size
A bedroom should be at least 8 feet by 10 feet in size. A Twin XL bed can fit in the children’s bedroom or a dorm room.
Twin Mattress Size
Dimensions: 38” x 75”Shop MattressTwin size mattresses measure 38 inches in width and 75 inches in length (96.52 cm x 190.5 cm). If you're buying a Twin size mattress for the first time, it's likely for a child's first big bed or as a space-efficient option for a guest room or dorm. Perfect for small spaces, Twin mattresses blend comfort with practicality, suited for both regular and occasional use.
To determine if a Twin size mattress is right for your needs, compare it with Twin vs Twin XL, Twin vs Full.Ready to purchase a new mattress? Visit our Twin size mattress collection page to find the best options for your space.
Best For
Growing kids, small bedrooms, bunk beds and dorm rooms.
Room Size
For a single Twin bed, a room should be at least 7 feet by 10 feet. Planning to use two Twin beds? Ensure your room is at least 9 feet by 9 feet to accommodate both comfortably.
Other Mattress Sizes
Crib Mattress Size
Dimensions: 28” X 50” | 2.33 X 4.16 FeetCrib size mattresses are 28 inches wide and 50 inches long (71.12 X 127 cms). A crib size mattress is the smallest mattress size available on the market and is primarily designed for toddlers and small children. Because of its small dimensions, it can easily fit into a children’s room. It can also be placed in the same room as yours if the bedroom is large.
Small Single Mattress Size
Dimensions: 30” X 75” | 2.5 X 6.25 FeetA small single bed is a long narrow bed 30 inches wide and 75 inches long (76.2 X 190.5 cms). It is a good fit for children’s narrow beds with extra length for tall teens. They can also be used for the spare room in your house and can be used to aesthetically enhance your lounging space in the house.
Olympic Queen Mattress Size
Dimensions: 66” X 80” | 5.5 X 6.67 FeetA small single bed is a long narrow bed 30 inches wideAn Olympic queen size mattress is 66 inches wide and 80 inches long (167.64 X 203.2 cms). Because it is an uncommon size, it can be challenging to accessorize it or find a bed frame for it. This is an excellent choice for couples who want more space than a standard queen-size mattress. This size lies somewhere between a king and a queen and is a good fit for the master bedroom of the house. It is a good fit for children’s narrow beds with extra length for tall teens. They can also be used for the spare room in your house and can be used to aesthetically enhance your lounging space in the house.
Split King Mattress Size
Dimensions: 38” X 80” | 3.25 X 6.67 FeetA Split King mattress is two Twin XL mattresses (38 inches x 80 inches) put together, making it 76 inches wide and 80 inches long king size mattress. A split king mattress is popularly used with adjustable beds, and each side of the bed can have an independent setting. It limits motion transfer to a large extent, helping light sleepers fall asleep easily.
