Defining standard sofa sizes is a difficult task. While the standard three-seat sofa dimensions are 84 inches wide by 35 inches deep, there are quite a few variations from brands across the board.
Whether you’re looking for a sectional sofa with a chaise lounge or a simple loveseat, couch dimensions can vary widely. In this guide we seek to definite standard dimensions for each type of sofa to help you decide what sizes to expect when picking out a new sofa.
Different Types of Sofas to Consider When Sizing Your Couch
While sizing up what your sofa length should be for your living room, keep in mind that all furniture pieces are different and can vary from the average sofa’s standard measurements.
You might be interested in a large multi-piece sectional sofa with a deep seat depth for the ultimate lounging experience. On the other hand, you might be in a small space and need the size of the sofa to be more like a loveseat to properly fit in your family room.
Let’s take a look at some of the most popular options and their standard measurements so you can start to narrow down what will likely work best for your living space.
Sofa Dimensions Size Chart
| Sofa Type | Dimensions |
| Armchair | 36″ width, 38″ depth, 34″ height |
| Loveseat | 63″ width, 38″ depth, 34″ height |
| Three-Seat Sofa | 90″ width, 38″ depth, 34″ height |
| Four-Seat Sofa | 117″ width, 38″ depth, 34″ height |
| Five-Seat Sofa | 144″ width, 38″ depth, 34″ height |
| Six-Seat Sofa | 171″ width, 38″ depth, 34″ height |
1. Standard Sizes for Sectional Sofas
If you’re interested in something a piece of furniture a bit larger than the standard sofa, a sectional might be a good option to complement your coffee table and other living room furniture.
Sectional sofas come in a variety of sizes and can vary from seating three to a seven (or more) seater sofa depending on how many additional sections you add to a customizable option. Their measurements can also vary widely as sectionals come in a range of sizes and shapes. Let’s look at a few common options.
Equal Sides Sectionals
Sectionals with equal sides typically come with five seats and average dimension of 95 inches by 95 inches with seat depths varying from 37 inches to 40 inches.
Chaise Sectionals
Chaise sectionals, one of the most popular, have an average depth of 37 inches to 40 inches with varying lengths depending on the number of total seats. However, a typical seven seat chaise sectional is 195 inches to 215 inches long.
Three-Seater Sectionals
The three seater sectional sofa is 37 inches to 40 inches deep and 78 to 88 inches long. Seat height can varies
Wondering about seat height? Most couches range from 15 to 20 inches from floor to cushion top, with 17-18 inches being the standard.
2. Standard Sizes for Sleeper Sofas
Another common option is the sleeper sofa which includes a bed built-in under the seat cushions. It’s one of the most common pieces of furniture for small apartments where a spare room isn’t available for guests.
Queen Sleeper Sofa
Standard queen sleeper sofa dimensions are 92 inches wide, by 39 inches tall, and 40 inches deep when in seating position. When in bed-out position, they are typically 89 inches deep from the front of the mattress to the back of the sofa. In terms of the sleeper sofa mattress, the average queen size is 60 inches wide, 72 inches deep and 4.25 inches high.
Full Sleeper Sofa
Standard full sleeper sofas dimensions are 78 inches wide, by 36 inches tall, and 38 inches deep when in seating position. When in bed-out position, they are typically 89 inches deep from the front of the mattress through the back cushions. In terms of the sleeper sofa mattress, the average full size is 52 inches wide, 72 inches deep and 4.25 inches high.
Twin Sleeper Sofa
Standard twin sleeper sofas dimensions are 57 inches wide, by 36 inches tall, and 38 inches deep when in seating position. When in bed-out position, they are typically 89 inches deep from the front of the mattress to the back of the sofa. In terms of the sleeper sofa mattress, the average twin size is 33 inches wide, 72 inches deep and 4.25 inches high.
3. Standard Sizes for Loveseats
Loveseats are smaller, two-seater sofas. They are often used as a seating area in a small apartment, home offices or as an accent piece in bigger, open floor plans. The typical dimensions for settees and loveseats are 58 to 64 inches long, 58 inches wide, and 28 to 30 inches deep.
4. Sofas with Unique Dimensions
While many of the most common types of sofas have standard dimensions, there are some types of sofas that don’t full under the standard sizing guidelines we’ve laid out above. We’re referring to oversized sofas and modular sofas. Let’s take a little close look at these two sofa types.
Oversized Sofas
When it comes to interior design, some subscribe to the view that bigger is better. If you have the open floor plan to accommodate it, a jumbo size sofa is a great option. Oversized sofas are typically 90 inches wide for a sofa and 71 inches for a loveseat. They can be up to 40 inches deep.
Modular Sofas
Modular sofas can be customized to be as wide as you want. If you choose multiple pieces that wrap around, the ends could also be very different depths. That’s the great thing about modular sofas: they can be customized, and scaled down or up to suit any size room. These are a great fit for anyone looking to boost the accessibility and versatility of their living room.
Other Factors To Consider When Choosing a Sofa Size
Sofa brands use wide range of different materials to construct their sofas. The sofa you decide to go with should take into account how this may affect the size.
For example, a leather sofa should not be placed right up against a wall to ensure no rubbing. You also have to consider the rest of your floor plan. Do you plan to have a coffee table? Do you plan to have an accent chair or loveseat? All of these should factor into your decision.
Keep in mind, Home of Cozy has a wide range of articles that can help you on your search. Check out some of our other guides on best places to buy a sofa and the best sectional sofas to help your shopping journey.