‘Double’ versus ‘Full’ Bed Size Mattress: What is the Difference?

Understanding bed sizes can be confusing, especially with terms like “double” and “full” when mattress shopping. We’ll break down what you need to know about the difference in double and full bed sizes, compare them with other standard mattress sizes, and answer some common questions to help you make the right choice for your sleep space.

Are ‘Double’ and ‘Full’ the Same Bed Size? What are the Dimensions of Double and Full Bed?

Yes, “double” and “full” are the exact same mattress size and the name is often used interchangeably to refer to a bed size that is 54 inches wide by 75 inches long. This size is about 16 inches wider than a twin, making it a better fit for single adults who want extra room or couples willing to sleep in close quarters.

Why is it Called a “Double Bed”?

The term “double” was originally used to describe this bed size, as it was designed to accommodate two people. Over time, “full” gained popularity in North America to emphasize this size as a step up from a twin, though not as large as a queen or king. When first introduced, the double bed was marketed as “double” the width of a twin, offering more space for single sleepers or cozy quarters for couples. Despite its name, a double bed isn’t twice the size of a twin but does provide additional width, making it a comfortable choice for those wanting extra room.

Standard Mattress Sizes Explained

To understand where the double/full bed fits among other mattress sizes, here’s a look at the standard bed dimensions in North America:

• Twin Bed: 38 inches wide by 75 inches long
• Twin XL Bed: 38 inches wide by 80 inches long
• Full/Double Bed: 54 inches wide by 75 inches long
• Queen Bed: 60 inches wide by 80 inches long
• King Bed: 76 inches wide by 80 inches long
• California King: 72 inches wide by 84 inches long

What’s Bigger than a Twin but Smaller than a Full?

If a twin feels a bit cramped but a full bed is too wide, a Twin XL might be a perfect middle ground. Twin XL beds measure the same width as a twin (38 inches) but offer an extra 5 inches of length, making them ideal for taller individuals who don’t need a wider mattress. Twin XL mattresses and beds are often found in dorm rooms as it saves space while providing adequate sleeping area for students.

Room for Two: Can Couples Sleep on Twin or Full Beds?

One common question is whether two people can comfortably sleep on a twin or full bed:

• Twin Bed: Despite its name, at just 38 inches wide, a twin bed is really only suited for one person. It’s especially not recommended for two adults, although two children might manage.
• Full Bed: A full bed can technically fit two people, but each person would have about 27 inches of space (less than a twin bed width each). For couples who don’t mind close quarters, a full bed may work, but for a more comfortable sleep, a queen bed (60 inches wide) is usually a better choice.

Special Configurations with Twin and Full Beds

If you’re considering combining bed sizes or modifying your sheets, here’s what you need to know:

• Two Twin Beds Together: Putting two twin beds side by side won’t make a standard bed size. Two twin beds placed together would measure 76 inches wide by 75 inches long, which is as wide as a standard king bed but 5 inches shorter. If you would like the dimensions of a king bed, opt for two twin XL beds, which are longer and will result in a bed that is 76 inches wide by 80 inches long.
• Two Full Beds Together: Placing two full beds together would result in a size of 108 inches wide by 75 inches long, which is significantly wider than a king, creating a super-spacious setup often seen in luxury hotels. This setup would result in a bed size similar to the Alaskan king, which is 108 inches wide by 108 inches long.

Sheet Size Compatibility

• Full Fitted Sheet on Twin XL Bed: Full-sized sheets are too large for a twin or twin XL bed and will not fit snugly, so it’s best to stick with either twin or full-size sheets and not assume they can be interchangeable.
• Queen Fitted Sheet for a Full Bed: Adjusting a queen-sized fitted sheet to fit a full may have be possible, though excess fabric is likely. In those instances, sheet clips may help ensure a smooth and taut sleeping surface.

Mattress Heights for a Full Bed

The standard mattress height for a full bed can vary widely, typically ranging from 8 to 14 inches, depending on the mattress type and brand. Higher mattresses offer more support layers, but keep in mind that a thicker mattress may require deeper pocket sheets. With its grippy, reinforced elastic band and superior stretch, the Evercool®+ Cooling Fitted Sheet can accommodate deep pocket mattresses up to 18 inches, allowing customized comfort and peace of mind.

Understanding the dimensions and options for each mattress size can make a significant difference in choosing the right bed. A double bed is the same as a full bed, and while it provides a bit more room than a twin, couples often find it a tight fit. If you’re deciding on a bed that comfortably suits your space and sleep needs, knowing the standard sizes and options for customization will help you create the perfect sleep environment.

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