Sofa dimensions: standard sizes and how to measure

Standard sofa sizes by type

There is no single official standard, but most sofas fall within these ranges. Use them to narrow your search, then always check the exact measurements of the model you want.

Overall height for most sofas is typically 30 to 36 in (76 to 91 cm). Low-profile and contemporary designs can sit closer to 26 to 30 in; high-back and traditional styles can reach 38 in or more.

A practical rule for capacity: allow roughly 24 to 30 in (61 to 76 cm) of seat width per person. Arms count against overall width, so a sofa with wide, rolled arms seats fewer people than a track-arm sofa of the same length.

Seat height, seat depth and arm height

Overall size tells you whether a sofa fits the room. These internal measurements tell you whether it fits you.

Seat depth is measured from the front edge of the seat to the face of the back cushion, and manufacturers do not all measure it the same way, so ask if it is unclear. As a guide, people under about 5 ft 5 in often prefer 21 to 22 in; people over about 6 ft often prefer 24 in or more.

Seat height should leave your feet flat on the floor and your knees roughly level with your hips. Lower seats look sleek but are harder to rise from; that matters for older relatives and anyone with joint pain.

Cushion compression also changes the numbers. Seat height is usually quoted to the top of an uncompressed cushion; a soft down-wrapped seat can sink an inch or two when you sit, while a firm foam seat barely moves. If you are between sizes, sit on the actual model or one with the same cushion construction.

Arm height matters for nappers: a lower arm (around 22 to 24 in) makes a better pillow; a higher arm gives more support when sitting upright.

How to measure your room

Measure the space before you shop, and write the numbers down.

1. Measure the wall where the sofa will go, from corner to corner or between obstacles such as radiators, windows, vents and outlets.
2. Apply the two-thirds rule. A sofa typically looks balanced at no more than about two-thirds of that wall's length. On a 12 ft (144 in) wall, that suggests a sofa up to about 96 in.
3. Measure the depth available from the wall to the nearest obstacle or walkway, then subtract clearance (see below).
4. Check vertical limits: window sills, wall lights and shelves can clash with a high back.
5. Tape it out. Mark the full footprint on the floor with painter's tape, including the chaise or corner of a sectional, and walk around it for a day or two.

For sectionals, measure both walls from the corner and note which side will hold the chaise or return. Our sectional sofa guide explains left-arm and right-arm facing configurations.

How to measure doorways, stairs and elevators

A sofa that fits the room still has to fit through the building. Measure every point on the route from the street to the room.

Measure the sofa

• Height, depth and width from the product page.
• Diagonal depth: lay a straightedge from the top of the back to the front edge of the arm. Measure from the inside back corner (where seat meets back) straight out to that straightedge. This is the smallest profile the sofa has when tilted back through a door.

Measure the route

• Doors: clear width with the door fully open (inside the frame, not the outside of the trim), and height. Removing the door from its hinges usually gains about 1 in or more.
• Hallways: width, plus the width of any doorway you must turn into from the hall. Tight turns are the most common failure point.
• Stairs: width, ceiling height above the stairs (watch for low landings and light fittings), and the dimensions of any turn or landing.
• Elevators: door width and height, interior width, depth and height, and the interior diagonal from floor corner to opposite ceiling corner. A sofa often has to stand on end in an elevator.

Will it fit?

As a rule of thumb, a sofa will usually go through a door if either its height or its depth is smaller than the door's clear width, and its width is less than the door height. If neither fits, compare the diagonal depth with the door width; if the diagonal is smaller, the sofa can typically be tilted through. Removable legs, removable arms and modular sections make difficult routes far easier, which is one reason modular systems such as Telaio suit walk-ups and older buildings.

Clearance rules around a sofa

The sofa should fit the room with space to move around it. These are typical interior design guidelines:

A coffee table is usually about two-thirds the length of the sofa and roughly level with, or slightly lower than, the seat; see the coffee table size guide. For rugs and full room plans, see the rug size guide and living room layout guide.

Choosing the right size for your space

Use the room and household together:

• Small apartments and studios (living space under about 150 sq ft): a loveseat or apartment sofa of 60 to 80 in, with slim track arms and raised legs that let you see the floor beneath and make the room feel larger. Compact models like the Borgo are designed for this.
• Average living rooms (about 12 × 14 ft to 14 × 16 ft): a three-seat sofa of 80 to 90 in, or a compact chaise sectional.
• Large or open-plan rooms: an L-shaped or U-shaped sectional, or a sofa plus loveseat, often floated to define a seating zone.

If you host overnight guests, a sleeper adds a bed without a spare room, but plan for its open length. The Riva, for example, hides a queen sleeper inside a regular sofa silhouette. For a sofa sized to your exact wall, Create your sofa lets you choose dimensions and modules. Browse all sofas and sectionals.