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What size art goes above a sofa

One rule settles ninety per cent of cases, and there are two numbers almost nobody measures. Here are all three, with a table by sofa width so you don't have to work anything out.

The width: the two-thirds rule

The right size for art above a sofa is two thirds of the sofa's width. It's the proportion interior designers use, and the one that makes the two read as a single unit rather than two separate objects.

The workable range runs from two thirds to three quarters. Below half, the piece looks like a stamp stuck on an enormous wall. Above three quarters it starts competing with the sofa and the wall closes in.

Watch the detail that always slips: the maths is on the mounted frame, not the paper. A 50 × 70 print with a 30 mm moulding and a 70 mm mat measures 70 cm across once it's hanging, not 50. That's twenty centimetres of difference, and at that scale you notice.

The height: 15-25 cm above the back

The bottom edge of the frame goes 15 to 25 centimetres (6-10") above the sofa back. Less than 15 and the art looks like it's resting on the furniture; more than 30 and the relationship breaks, the piece starts floating on its own.

The other reference, the museum one, is that the centre of the work sits around 145-150 cm (57-59") off the floor — average standing eye level. Above a sofa the two rules usually agree; when they don't, the sofa-back rule wins, because art above a sofa gets looked at from a seat.

A table by sofa width

Sofas come in fairly standard widths. These combinations work, with the frame already counted in:

Past 240 cm, a single piece that obeys the rule has to be made to measure and the price jumps. That's the range where a set is worth building — and it looks better anyway.

If it's more than one piece

With two or more, the individual piece stops mattering and the rectangle they form together takes over. That rectangle is what should measure two thirds of the sofa. Inside it, different rules apply:

• Spacing between 5 and 8 cm (2-3"). Gallery distance. Under 4 the pieces look glued together; over 10 they stop reading as a set.
• One shared axis. Either align everything on the horizontal centre line, or align the top edges. What doesn't work is each piece doing its own thing.
• Odd numbers when sizes differ. Three or five. With even numbers the eye hunts for symmetry and punishes any difference.
• Same frame, different art. It's the shortcut that makes a varied set look deliberate.

The three mistakes everyone makes

Hanging it too high

The number one error by a distance. People hang at the height they're standing at while holding the hammer, which is well above where it belongs. Always drop it a hand's width lower than your instinct says.

Measuring the print instead of the frame

Said above, but it's the cause of half the returns in online art stores. The customer buys thinking 50 × 70 and receives an object that's 70 × 90 and doesn't fit where they'd planned.

Ignoring what's underneath

A floor lamp, a shelf or a tall cabinet changes the geometry. The two-thirds rule is about the sofa, but if there's anything else on that wall, the set that counts is sofa plus whatever it is.

Or: see it before you buy it

Everything above is a set of rules for imagining the result. There's a better way: if the store you're buying from has augmented reality, you point your phone at your own wall and see the piece hanging there at real size and in its real frame, above your own sofa, before paying. No tape measure, no brown paper.

That's exactly what InRoom Wall Art does — the app we make. Your phone's native viewer anchors the piece to the wall at its true size. If you sell art online, it's how this guide stops being necessary.

Keep reading: standard frame and print sizes, or how to hang a gallery wall.