A twin size bed, also referred to as a single bed, accommodates one adult or child. A twin mattress is 39 inches by 75 inches and typically works best in smaller bedrooms, on daybeds or with bunk bed sets. While it's possible to have two sleepers on a twin bed, it might be too snug. One sleeper is usually able to lie comfortably on a twin size mattress.
A twin size extra-long (XL) bed provides ideal comfort for tall children and adults as well as growing teenagers. A twin XL mattress measures at 39 inches by 80 inches, which is about 5 inches longer than a standard twin size mattress. This size bed is perfect for taller guests, and having two of them in a larger guest room is always a safe option. Two twin XL beds can be used for single sleepers or accommodating couples by pushing together both beds to make a king size bed.
A full size bed, also known as a standard mattress, is 54 inches by 75 inches and can accommodate two sleepers if necessary. While a full mattress was originally manufactured for two people, it has become a more spacious option for a single sleeper and is a perfect option for an older child or teenager. A full size bed is typically 15 inches wider than a twin bed, offering more room for a single sleeper to move around. This type of bed is a safe choice for a guest room because it can accommodate two people or act as a larger sleeping space for one person.
A queen size bed is 60 inches by 80 inches and provides plenty of space for two sleepers to spread out comfortably. This model is a good option for two adult sleepers that want extra room while lying down. A queen size bed fits best in medium-sized rooms or small master bedrooms. A queen mattress is the popular mattress size because it's a perfect compromise if you're looking to save bedroom space while maintaining a large sleeping surface.
A king size bed is 76 inches by 80 inches and offers couples or single sleepers maximum space to spread out. A king size mattress is the same length as a queen size mattress but 16 inches wider to better complement two sleepers. This size bed works best for tall people or sleepers whose children or pets like to share the bed from time to time.
A California king size bed is a special edition king size bed that caters to taller people by giving them longer sleeping surface. A California king mattress is 72 inches by 84 inches, sacrificing 4 inches in width but adding 4 inches in length to a standard king model. This kind of bed can accommodate someone as tall as 7 feet, and it fits best in a larger bedroom or master bedroom.