If you’re shopping for a new bed, one of the most common questions is, what size is a double mattress? It’s a standard size, but the exact dimensions can vary slightly depending on where you live, which can lead to some confusion. This guide will give you all the details you need, from precise measurements to shopping tips, to ensure you choose the perfect fit for your space and needs.
What Size Is A Double Mattress
In the United States and Canada, a standard double mattress, also often called a “full” mattress, measures 54 inches wide by 75 inches long. That’s 4 feet 6 inches by 6 feet 3 inches. This makes it 15 inches wider than a twin bed but 6 inches narrower than a queen. It’s a classic size that has been a popular choice for single sleepers and couples for decades, though its space for two adults can be cozy.
Standard Double Mattress Dimensions in Different Regions
It’s crucial to know that mattress sizes aren’t universal. The “double” size can mean different things in different countries.
- UK and Ireland: A standard UK double mattress is 135 cm wide by 190 cm long (approximately 53 inches by 75 inches). This is very close to the US full size, just an inch narrower.
- Australia: An Australian double is 138 cm wide by 188 cm long (about 54 inches by 74 inches). The length is slightly shorter, which is important for taller individuals.
- Europe: Continental European sizes vary, but a common double (or “matrimonial”) size is 140 cm by 200 cm (about 55 inches by 79 inches). This offers a bit more width and length than the American standard.
Always check the specific measurements in inches or centimeters before you buy, especially if your bed frame is older or you’re purchasing from an international retailer.
Who is a Double Mattress Best For?
A double mattress is a versatile choice, but it’s not perfect for every situation. Here’s who it suits best.
- Single Adults: It’s an excellent upgrade from a twin, offering ample room to spread out.
- Teenagers: Provides growing room and space for studying or relaxing.
- Couples on a Budget or in Smaller Rooms: It can work for couples, but both sleepers should be comfortable with close quarters. It’s not ideal if one or both partners are active sleepers.
- Guest Rooms: A great compromise that can accommodate a single guest comfortably or a couple if needed.
For couples who prefer more personal space, a queen (60″ x 80″) is generally a better long-term investment.
Double vs. Other Common Mattress Sizes
Comparing sizes side-by-side helps visualize the difference.
Double (Full) vs. Twin
A twin mattress is 38″ x 75″. A double adds a full 16 inches of width. That’s a significant increase in sleeping space, making it much more comfortable for most adults. A twin XL, common in dorms, is 38″ x 80″, offering extra length but not extra width.
Double (Full) vs. Queen
This is a critical comparison. A queen mattress is 60″ x 80″. That’s 6 inches wider and 5 inches longer than a double. Those extra inches make a world of difference for couples, providing each person with roughly the width of a twin bed. The queen is the most popular mattress size in North America for good reason.
Double (Full) vs. King
A standard king (Eastern King) is 76″ x 80″. It’s a massive 22 inches wider than a double, offering true, spacious sleeping for two. A California King is 72″ x 84″, narrower but longer.
How to Measure Your Room for a Double Bed
Before you buy, you need to ensure the bed and its surrounding space will fit comfortably. Follow these steps.
- Measure Your Room: Get the full length and width of the room. Don’t forget to note the location of doors, windows, radiators, and vents.
- Account for the Bed Frame: A bed frame or headboard will add to the overall footprint. Platform beds may be close to the mattress size, while frames with footboards or elaborate headboards can add several inches.
- Plan for Walkways and Furniture: Experts recommend at least 24 inches of walking space on at least two sides of the bed. If you’re adding nightstands (typically 18-24 inches wide) and a dresser, map it out on paper or use a room planner app.
- Consider Door Swing: Make sure the bedroom door can open fully without hitting the bed. This is a common oversight that can be very annoying.
A double bed in a frame can need a room that’s at least 10 feet by 10 feet to feel open and uncluttered, but it can work in rooms as small as 9×9 feet with careful planning.
Choosing Bedding for a Double Mattress
Once you have your mattress, you need the right sheets, comforters, and protectors. This is where knowing the exact dimensions matters.
- Fitted Sheets: Look for labels that say “Full” or “Double.” They should specify 54″ x 75″. Deep-pocket sheets are needed for mattresses over 10 inches thick.
- Flat Sheets and Comforters/Duvets: Standard full/double sets are designed to overhang the sides. A typical comforter size is 86″ x 86″, which provides a good drape.
- Mattress Pads and Protectors: Always purchase the size-specific protector. A queen protector will be too loose and could bunch up, which is uncomfortable.
Pro tip: Keep a tape measure in your linen closet. Mattress depths can vary, and it helps when shopping for new sheets.
Common Mistakes to Avoid When Buying a Double
A few simple errors can lead to frustration later on.
- Assuming All Doubles Are the Same: Always verify the exact dimensions in product details, especially with online brands that might have proprietary sizes.
- Forgetting About Height: A very tall mattress might require deep-pocket sheets and could make getting in and out of bed difficult for some.
- Not Testing for Couples: If buying for two, both partners should lie on it in the store. Simulate your normal sleeping positions to check if you feel cramped.
- Ignoring Future Needs: If you plan to stay in the same home for years, consider if a queen might be a more future-proof choice, even if the double fits perfectly now.
Taking your time during the research phase can save you from the hassle of a return or an uncomfortable night’s sleep.
Specialty and Non-Standard Double Sizes
Beyond the standard double, you might encounter some variations.
- Double XL: Sometimes called a “Full XL,” this size is 54″ x 80″. It offers the same width as a standard double but the length of a queen or twin XL. It’s a great option for single, taller sleepers in a narrow room.
- Older or Antique Doubles: Beds made before the 1950s might have non-standard dimensions. Always measure an antique frame carefully before ordering a new mattress.
- RV and Boat Mattresses: These are often custom sizes to fit specific vehicle layouts. A “RV double” is rarely a standard 54″ x 75″.
In these cases, you may need to order a custom-cut mattress, which is more expensive but ensures a perfect fit.
FAQ Section
Is a double bed big enough for two people?
It can be, but it depends on the people. Two average-sized adults who don’t mind sleeping close together can manage. However, it provides only 27 inches of width per person, which is less than a crib. For most couples, especially those who move in their sleep or are larger in stature, a queen is a more comfortable choice that offers more personal space.
What is the difference between a double and a full mattress?
In modern US terminology, there is no difference. “Full” and “double” refer to the same mattress size: 54″ x 75″. The term “double” originated because it was twice the width of a historic “single” bed, though modern twins are slightly wider than old singles. Retailers use the terms interchangeably.
How much bigger is a queen than a double?
A queen mattress is 6 inches wider and 5 inches longer than a standard double/full. The queen dimensions are 60 inches by 80 inches. The extra width is the most noticeable improvement for couples, giving each person significantly more room.
Can I use a double mattress on a queen frame?
No, you should not. A double mattress is 6 inches narrower and 5 inches shorter than a queen. On a queen frame or bed base, it will slide around, leave a large gap, and the queen-sized sheets will not fit at all. This can also void warranties. Always match the mattress size to the foundation size.
What are the dimensions of a double bed in feet?
A standard US double (full) mattress is 4.5 feet wide by 6.25 feet long. Remember that the bed frame will extend beyond these measurements, so you need to account for that in your room layout. The extra few inches from a headboard can make a difference in a tight space.
Is a double bed OK for one person?
Absolutely. For a single sleeper, a double mattress is often the ideal size. It provides plenty of room to stretch out without taking up the excessive floor space of a queen or king. It’s a popular and comfortable choice for single adults, teenagers, and university students in larger dorm rooms.