Mattress Size Guide

There are 11 different standard sizes for mattresses. A mattress size determines just how many people can sleep comfortably in a bed. Use the helpful mattress size chart above. See the difference between the sleeping space you'll get if you choose the size of a full bed, the size of a queen bed, the size of a king bed and more.

Tip: As a general rule, your bed size will be the same as your mattress size.

The size of a twin bed measures 39 inches wide by 75 inches long. Twin beds are made to sleep one person comfortably and are an excellent option for smaller bedrooms. Twin mattresses are most often used for children's rooms, guest rooms and dormitories. Most bunk beds are made with twin beds, making them ideal for families with multiple children.

• Best for: Kids or single sleepers
• Room size: Twin beds fit best in a 7' x 9' room. If you're using other furniture in a room, place this size bed in an 8' x 10' room so you'll have more space to move around.

Twin XL mattresses measure 39 inches wide by 80 inches long. They provide an additional 5 inches in length compared to a standard twin mattress. This extra length makes the Twin XL a good choice for taller individuals who need more legroom. Since they still maintain a compact size, Twin XL mattresses are commonly found in college dorm rooms and guest rooms.

• Best for: Taller individuals, single sleepers
• Room size: The minimum room size for a twin XL bed to fit comfortably is 7' x 10'. However, if you're adding other furniture, an 8' x 10' or larger room may work better.

The size of a full or double bed is 54 inches wide by 75 inches long. A double bed gives you more width than a twin or twin XL mattress. While full mattresses accommodate two people, it may be a bit snug for couples. It's better suited for single adults or teenagers who prefer more room to move around. With their perfect balance of space efficiency and comfort, full mattresses are a popular choice for smaller primary bedrooms or studio apartments.

• Best for: Single sleepers, teenagers
• Room size: The size of a full bed requires the minimum room size to be 9' x 10' feet. If you're adding a dresser or other furniture, a more spacious 10' x 12' room is recommended.

The size of a queen bed measures 60 inches wide by 80 inches long. It's the most common choice for couples and taller single sleepers. Queen mattresses strike a balance between comfort and space efficiency. Their added width and length provide a luxe sleep experience without overwhelming the room. With ample room for two people to sleep comfortably, queen beds fit well in primary bedrooms or larger studio apartments.

• Best for: Couples, single sleepers who prefer extra space
• Room size: The size of a queen bed needs a room to be a minimum of 10' x 10' for a proper fit. If you'd like more space to move around in, a 10' x 14' room is a better choice.

The size of a king bed measures 75 inches wide by 80 inches long. As the name implies, it has the most sleeping space of any standard mattress size. A king bed's generous size makes it ideal for couples who want maximum personal space, or single sleepers who simply enjoy a larger sleeping area. King mattresses provide unparalleled comfort and room to spread out. The extra width and length ensure that even the most restless sleepers have plenty of space. They are a standard in spacious primary bedrooms, oversized lofts and large guest rooms.

• Best for: Couples who want extra space, individuals who prefer a spacious bed
• Room size: The size of a king bed requires a minimum room size of 12' x 12' feet for a proper fit. However, a 13' x 13' or bigger room is better for this mattress size, especially when it's part of a bedroom suite.

A California king mattress measures 72 inches wide by 84 inches long. Longer but slightly narrower than a standard king mattress, its unique dimensions make it ideal for those who prioritize length over width. The choice of taller sleepers, it provides extra legroom while still providing ample width for couples. California King mattresses offers the most spacious sleeping experience and work well in very large primary bedrooms or sleeping areas.

• Best for: Taller individuals, couples
• Room size: The minimum room size for a California king bed is 12' x 12' feet. However, if you’re looking to outfit the room with a seating area and other furniture, choose a room 13' x 13' or larger.

In addition to standard mattress sizes, there are also several specialty sizes to choose from. From cribs to Alaskan King, there's a mattress size for most every kind of sleeper.

• A crib mattress typically measures 28 inches wide by 52 inches long. Designed to fit snugly in a standard crib, these mattresses are firm and safe for infants and toddlers. Crib mattresses are essential for ensuring a safe sleeping environment for babies and meet strict safety standards.
• A toddler mattress also measures 28 inches wide by 52 inches long. These mattresses, however, often have a softer feel compared to crib mattresses but still provide the necessary support for growing children.
• A daybed mattress is typically the size of a twin mattress, measuring 38 inches wide by 75 inches long. Providing a space for sitting and sleeping, daybeds are a versatile solution for homes without a designated bedroom or guest room. They are ideal for studio apartments or multipurpose rooms.
• An Olympic queen mattress measures 66 inches wide by 80 inches long. It is an extra 6 inches wider than a standard queen. The Olympic Queen is a great option for those who want more room to spread out without upgrading to a king size.Wyoming King Mattress:
• A Wyoming king mattress measures 84 inches wide by 84 inches long. Its unique square shape is perfect for those who want maximum sleeping space and a dramatic bedroom focal point.
• A Texas king mattress measures 80 inches wide by 89 inches long. Much longer than a standard king size, it's ideal for extra tall sleepers who crave more legroom.
• An Alaskan king mattress measures 108 inches wide by 108 inches long. This massive mattress is perfect for very large, very spacious primary bedrooms and provides an unparalleled amount of space.

Make finding the best mattress sizes for you simple with the following tips:

• Consider your preferred sleeping position. Do you curl up or like to stretch out? This can influence which mattress size provides the best comfort and support for your body.
• Consider whether you sleep alone or with a partner. This will affect your mattress size and motion isolation needs.
• Measure your room. The right size mattress will leave enough space for easy movement around it.
• Establish a budget. Narrow down your options and invest in the best mattress size you can afford.