What Size Wall Decor Do You Actually Need? A Room-by-Room Guide in Inches

Short answer: whatever hangs above a piece of furniture should be about two-thirds its width. Hang the centre of a single piece at 57 to 60 inches from the floor. Leave 15 to 20 cm between the top of furniture and the bottom of the piece. Almost every wall that looks wrong is a wall where something too small was hung too high.

The two-thirds rule

This is the one rule that fixes most rooms. Measure the furniture the piece will sit above, and aim for roughly two-thirds of that width.

If you are hanging a group rather than a single piece, treat the whole group as one shape and apply the same two-thirds figure to its outer edges.

Height: 57 to 60 inches to the centre

Gallery hanging height is measured to the centre of the piece, not the top or the hook, and the standard is 57 to 60 inches (145 to 152 cm) from the floor. That is average adult eye level, and it is why museum walls feel comfortable to walk along.

Two adjustments to that number are worth making. In a room where people are mostly seated — a living room, a dining room — drop it slightly, towards 145 cm. In a room with very high ceilings, resist the urge to raise it much; the fix for a tall wall is a bigger piece, not a higher one. Hanging things too high is the second most common mistake after buying them too small.

Above furniture, the governing measurement changes: leave 15 to 20 cm of wall between the top of the sofa or console and the bottom of the piece. Any more and the two stop reading as a group.

Wall clocks

Clocks are judged from across a room, so they need more size than people expect.

• Living room, above a sofa or console: 24 to 36 inches.
• Large feature wall or double-height space: 36 inches and above. A statement clock is one of the few single objects that can carry a wall that size.
• Bedroom, study, kitchen: 14 to 20 inches.
• Office reception: 30 inches and above; it is read from a distance.

Anything under 18 inches on a main living room wall will look like an afterthought no matter how good the design is. If your budget only reaches a small clock for a big wall, buy the small clock for the bedroom instead and give the living room wall a larger piece later.

Wall mirrors

Mirrors follow the two-thirds rule above furniture, with a few extra numbers of their own.

• Full-length mirror: 60 inches tall minimum to see a complete outfit; 65 to 70 inches is more comfortable. Width of 20 to 30 inches suits most rooms.
• Above a console in an entryway: two-thirds the console width, hung 15 to 20 cm above it.
• Above a bathroom vanity: match the vanity width or come in slightly narrower; never wider.
• Narrow hallway: a tall, narrow arched mirror. A wide mirror in a corridor makes it feel more cramped, not less.
• Cluster or set of three: space them 5 to 10 cm apart and treat the outer edges as the width for the two-thirds calculation.

One placement rule worth knowing: a mirror reflects whatever faces it, so hang it opposite something worth doubling — a window, a plant, a lit corner — and not opposite a cluttered shelf or a doorway into a utility area.

Wall art and hangings

• Single piece above a three-seat sofa: 100 to 140 cm wide.
• Pair: two pieces of equal size, 5 to 8 cm apart, centred together on the furniture below.
• Gallery wall: keep 5 to 8 cm between frames throughout, and lay the whole arrangement out on the floor before a single nail goes in.
• Staircase: follow the angle of the stairs, keeping each piece 57 to 60 inches above the tread directly beneath it.
• Above a bed: narrower than the headboard, never wider, and lighter than you think — anything heavy above a sleeping head is a bad idea.

How to check before you buy

Cut a piece of newspaper or cardboard to the exact dimensions of the piece you are considering and tape it to the wall. Leave it there for a day and walk past it. This takes ten minutes and it is the single most reliable way to avoid an expensive mistake — the difference between a 24-inch and a 32-inch clock is very hard to judge from a photograph on a phone, and very obvious on a wall.

Measure the wall itself too, not just the furniture, and note where the light falls. A metal piece on a wall that gets direct afternoon sun will throw shadows that change through the day, which is usually a feature rather than a problem, but it is worth knowing in advance.

If nothing is the right size

This is more common than it should be, because most decor is made in a handful of standard sizes and most walls are not standard.

Everything in our wall clock, wall mirror and wall art collections is handcrafted to order in our own workshop, which means a piece can be made in the dimension your wall actually needs rather than the nearest one available. If you have a measurement and a wall, send it to us and we will tell you what is possible.