Furniture Buying Guide: Sizes and Materials Explained

The sofa fits the wall but jams at the turn of the stairs, or the dining table fits the room and nobody can pull a chair out. Shopping by the label is where it goes wrong: on one furniture retailer’s size chart, a standard three-seat sofa typically runs 72 to 96 inches long, so “3-seater” alone can’t tell you whether it fits. This guide follows the order you do the job in: measure the way in, plan the gaps, size each piece, judge what it is made of, then read the listing.

The short answer

Step	Measure	Work to
The way in	Narrowest door, hallway, stair turn	Larger than a sofa’s depth or tilted height (at least one smaller side), box included
Walkways	Main paths through the room	30–36 in; one maker says about 24
Sofa	The wall, a seat you like	72–96 in for a three-seater; seat 17–19 in high on most
Coffee table	Top of your seat cushions	16–18 in high, 1–2 in below the cushions, 12–18 in away
Dining table	Room minus 36 in on every side	24 in of edge per person, 36–42 in wide
Bed	The frame, not just the mattress	Queen 60 x 80 in, king 76 x 80 in; 24–30 in to walk round
Nightstand	Floor to top of mattress	Within 2–4 in of it

Will it fit through the door?

Measure the way in first: no rearranging can fix it. Walk the route from the entrance the delivery team will use to the room, measuring as you go.

• Doorways. The inside height and width. Open the door fully and measure from the edge of the open door to the inner frame.
• Hallways and corners. The width, the ceiling height and every turn, counting door handles and light fixtures that make the space narrower.
• Stairs. The width at the narrowest point, especially where there is a railing, plus the ceiling height and the landing at every turn. If there is a banister, measure from the banister to the ceiling.
• Elevators. The door opening and the inside height, width and depth.

Sofas are often tilted or turned on the way in, so the narrowest point on the route has to be larger than at least one of the sofa’s smaller dimensions, usually its depth or its height when tilted. For a sectional or modular sofa, check each section, not the whole layout. For stairs and tight corners, compare the clearances with the sofa’s diagonal depth; if a listing doesn’t print it, ask the seller before you order (our suggestion).

Check the box as well as the piece, because a sofa can arrive fully boxed. The Coddle Nova Full-Sized Sleeper Sofa’s listing prints both: the sofa is 87 by 37 by 35.4 inches; the box is 76.4 by 38.2 by 26.2 inches and 290 lb packed. The box is about 10½ inches shorter and 9 inches lower than the sofa, but its 38.2 inch side is 1.2 inches more than the sofa’s depth (our comparison), so check each shape against the narrowest point on the route. It is $1,999 at 10 October 2026 prices (price for reference only). If the route has narrow halls or tight turns, a modular sofa that comes in separate sections is the easier fit.

How much space should you leave around each piece?

A piece that gets in still has to leave room to walk, sit and pull out a chair. Where the planning guides differ, the ranges below say so.

• Main walkways. 30 to 36 inches clear on one sofa maker’s measuring guide, and about two feet around the sofa on another’s. Aim for 30 and treat 24 as tight (our reading).
• Sofa to coffee table. 12 to 18 inches on one retailer’s coffee table guide: any closer and you risk bumping your knees, any further and the table is too far away. One maker’s delivery guide plans on 18.
• Around a sectional. 18 to 24 inches between the sectional and side tables or a media unit.
• Dining chairs. At least 36 inches from the table edge to walls or furniture, and 42 to 48 for high-traffic areas or larger chairs.
• Beds. At least 2 feet on each side and at the foot on one mattress maker’s guide, and 24 to 30 inches for walkways on a retailer’s mattress guide.
• Sleeper sofas, open. Most pull-out sleepers extend at least 60 inches forward when fully open, on one retailer’s sleeper guide; leave 18 to 24 inches of walking space around the open bed. Ask for the open depth if a listing doesn’t print it (our suggestion).

Before you buy, outline the piece on the floor with painter’s tape and live with it for a day. For a dining table, tape the table, add 20 to 22 inch rectangles for the chairs and pull each one back 18 to 24 inches to see the room with people sitting at it.

What size should each piece be?

Sofa

Three numbers define a sofa: length, measured on the outside from arm to arm; depth, from the front of the seat to the back, cushions and frame included; and height, from the floor to the top of the back. On one retailer’s size guide, most seats sit 17 to 19 inches off the floor and 20 to 24 inches deep: a shallower seat suits upright sitting, a deeper one lounging or taller people. Measure a sofa you already find comfortable and shop to those two numbers (our suggestion). For a sectional, plan on one seat cushion, about 18 inches, per person.

Type	Typical length	Typical depth
Loveseat (2 seats)	52–72 in	30–38 in
Apartment sofa	68–80 in	30–38 in
Standard sofa (3 seats)	72–96 in	30–38 in
Extra-long sofa (4 seats)	90–110 in	30–38 in
L-shaped sectional	90–120+ in	90–110 in (chaise)

Coffee table

There is no standard coffee table size, but coffee tables are generally 16 to 18 inches high; pick one about 1 to 2 inches below the top of your sofa cushions. If it is level with the sofa’s arms, it is too tall. For length, aim for about two-thirds of the sofa, so around 48 inches for a 72 inch sofa; with a chaise sectional, two-thirds of the sofa portion.

Dining table

Dining tables are 28 to 30 inches high, with 30 most common, which leaves 10 to 12 inches of leg room over chairs with 17 to 19 inch seats. To find the largest table your room takes, subtract 72 to 96 inches from its length and width, leaving 36 to 48 inches all round; a 12 by 10 ft room with 36 inches each side leaves roughly 72 by 48 inches. Then count places: 24 inches of table edge per person, 26 to 28 for larger chairs or formal dining. A rectangular table runs 60 to 72 inches long for four to six people, 84 for six to eight and 96 for eight to ten, and 36 to 42 inches wide, which supports about 15 inches of place setting depth plus 6 to 10 inches for shared serving space. Thick aprons and some trestle bases can limit how far chairs tuck in.

The Plank+Beam Contour Dining Table, 72 in is a worked example. It is 72 by 35.75 inches and 30 high, sold as a table for six: three places a side at 24 inches each (our arithmetic). At 35.75 inches wide it is a quarter inch under that 36 to 42 inch range (our arithmetic), so read the width as well as the seat count. With 36 inches all round it needs a room of at least 144 by about 108 inches, roughly 12 by 9 feet (our arithmetic). It is $499 at 10 October 2026 prices (price for reference only).

A rug under the table should reach 24 inches past it on every side so chairs stay stable when pulled out; the area rug guide covers sizes.

Bed

Mattress widths and lengths are largely standard, with differences of up to an inch, so check the frame’s inside opening against the mattress you have. On that retailer’s chart, a twin is 38 by 75 inches, a twin XL 38 by 80, a queen 60 by 80, a king 76 by 80 and a California king 72 by 84. A full is 75 inches long, but the same page prints its width as 52, 53 and 54 inches in different places. Plan the room around the frame, not the mattress: the Plank+Beam Classic Queen Bed is 85.5 by 64 inches around a 60 by 80 inch queen, 5.5 inches longer and 4 inches wider than the mattress (our arithmetic). Fitted-sheet depths and bedding sizes are in our bedding guide.

Nightstand

Measure from the floor to the top of your mattress, topper included, and look for a nightstand top within 2 to 4 inches of it. On the Classic Queen Bed, the slats sit 12 inches off the floor and the maker recommends an 8 inch mattress, so the mattress top is at about 20 inches (our arithmetic) and the nightstand should be within 2 to 4 inches of that. The bed is $319, or $219 in Clay, at 10 October 2026 prices (price for reference only).

What is it made of, and will it hold up?

Solid wood, veneer and engineered wood

Veneer is a thin layer of real wood applied over a stable core; engineered wood covers MDF, plywood and other composites. Well-built pieces often mix them: solid wood legs and frame with a veneer top, or engineered panels for backs, shelves and drawer bottoms, where solid wood may shift with temperature and humidity. The thing to look for, on that solid-wood maker’s guide, is engineered wood standing in for structure that needs strength. Hardwoods such as oak, walnut and maple offer more strength and longevity than softer pine or cedar, on a mattress maker’s nightstand guide, and the quality of engineered wood and veneers varies a lot between budget and premium pieces. The Contour table and Classic bed above are solid pine, the softer kind on that list.

Frame and joinery

How a piece is built matters as much as what it is made of. On a bed, look at the rails, slats, centre supports and weight capacity; on a table, the legs, the apron support and how stable the top is. In a nightstand’s drawers, dovetail or mortise-and-tenon corners mark more durable work than stapled or glued ones, and a fully finished interior is a better sign than raw wood or particleboard. For a sleeper sofa, look for kiln-dried hardwood or quality engineered frames and thick-gauge steel mechanisms, on one retailer’s sleeper guide. The Classic Queen Bed spells out what holds it up: seven solid pine slats 9 inches apart, a metal support bar and three underbed legs, rated for 750 lb resting weight; the maker says no box spring is needed. (The same page says “a metal support bar” in its description and “metal support bars” in its answers.) It is not compatible with adjustable bases.

Cushion fill

Foam density sets the feel of a seat: close to 1.8 lbs for medium-firm, nearer 1.5 for softer and 2.0 or more for firm, on one retailer’s sectional guide. If a listing says only “high-density”, ask for the number (our suggestion). The Nova’s listing says its cushions are designed to start out slightly firmer than most and soften gradually over time.

Upholstery

Performance fabric is upholstery designed to resist stains, wear, fading and moisture, and solution-dyed fibres, coloured during manufacturing, are the more fade-resistant kind. Read the cleaning code tag before you clean anything; it says which cleaners the fabric takes. For performance fabric, that retailer’s care guide suggests mild soap and water for water-based spills and a solvent-based cleaner for oil-based ones. Leather wipes clean but can attract pet hair and needs conditioning a couple of times a year; against claws, tightly woven performance fabrics can stand up better, on that retailer’s guide.

What to check in the listing before you order

• Every dimension. Overall width, depth and height; seat height and depth; each section of a sectional; a sleeper’s open size; the box size if given.
• What it is made of, part by part. A “solid wood” label doesn’t tell the whole story: look for the legs, frame, top and panels separately, and the fabric’s cleaning code.
• What holds it up. On a bed, slat spacing, centre supports, weight capacity, and whether it needs a box spring or takes an adjustable base; on a sofa, what the frame is made of (our suggestion).
• Delivery and assembly. Whether it is set up in your room or arrives in a box for you to build.
• The returns policy. Read it on the seller’s site before you order, including who pays to collect a large piece and what condition it must be in.

More guides to choosing furniture by room are on the category page.

Where these numbers come from

Clearances and sizes come from furniture makers’ and retailers’ planning guides, linked at each figure. Product measurements and prices are from each maker’s product page, read on 10 October 2026; sums marked “our arithmetic” are ours.

Frequently asked questions

How do I measure a couch to see if it will fit through the door?

Take the couch's overall width, depth and height from the listing, then measure every door, hallway, stair and elevator on the route at its narrowest point. On one sofa maker's delivery guide, the narrowest point has to be larger than at least one of the sofa's smaller dimensions, usually its depth or its height when tilted. If it ships boxed, check the box as well.

What is the standard size of a couch?

On one furniture retailer's size guide, a standard three-seat sofa is typically 72 to 96 inches long, 30 to 38 inches deep and 30 to 36 inches high, with most seats 17 to 19 inches off the floor and 20 to 24 inches deep. The same guide puts a loveseat at 52 to 72 inches long and an apartment sofa at 68 to 80.

How tall should a coffee table be?

There is no standard size, but on one retailer's coffee table guide they are generally 16 to 18 inches high; pick one about 1 to 2 inches below the top of your sofa cushions. Measure your own seat height and subtract; a table level with the sofa's arms is too tall by that guide.

What size dining table do I need?

Take 72 inches off the room's length and width to leave 36 inches on every side; what is left is the largest table that fits. Then allow 24 inches of table edge per person. On one retailer's dining guide, a rectangular table is 60 to 72 inches long for four to six, 84 for six to eight, and 36 to 42 inches wide.

How tall should a nightstand be?

Within 2 to 4 inches of the top of your mattress, measured from the floor with any topper included, on one mattress maker's guide. A bed whose slats sit 12 inches up, with an 8 inch mattress on them, puts the mattress top at about 20 inches (our arithmetic).