Which canvas fits your wall? A size chart in centimetres

Measure the usable wall

Not corner to corner. The usable wall is the uninterrupted stretch between whatever bounds it: a door architrave, a window reveal, the edge of a chimney breast, the line where a radiator starts.

People measure the room and then wonder why the answer feels wrong. A four-metre living room wall with a door at one end and a radiator at the other has about 210 cm of usable wall in the middle, and 210 is the number that goes into the chart.

The chart: wall width to canvas size

Sizes are height first. The column that matters here is the second number.

The line where it turns is around 180 cm of wall. Below it, the proportion and the collection agree. Above it, they part company, and the rest of this article is about what to do with that rather than pretending it away.

Why an upright collection changes the answer

Every canvas in this series is upright or square, from 50 × 30 cm to 120 × 100 cm, and the widest is 100 cm. That is not an oversight in the range. These are portraits of one person, and a standing figure wants a standing canvas.

The consequence for a wide wall is real and it is worth stating plainly rather than dressing up. A 260 cm wall wants roughly 160 cm of image across the middle if you follow the proportion, and this collection cannot supply it in one piece. You have four options and only three of them are any good:

• One canvas, centred, with wall either side. The best of the four. See the next section.
• One canvas plus something that is not a picture of a person — a mirror, a shelf, an object, a drawing. The mix is what stops it becoming a themed display.
• Put furniture under it and let the sofa or the sideboard carry the horizontal, so the canvas only has to relate to the furniture rather than to the whole wall. The sofa arithmetic covers that case.
• Two canvases side by side to make up the width. Do not. Two figures next to each other stop being two people and become a category, which is a much worse statement than either makes alone — the argument is in how to display the work at home.

The empty space is the point

The instinct on a wide wall is that empty space is something you failed to fill. With a single figure it is the opposite: the empty wall is what makes the canvas hold attention rather than compete for it.

A painting that fills its wall has to be looked at all at once, which is how you look at wallpaper. A painting with two feet of nothing on either side is an event on a surface, and the eye goes to it and stays. Galleries hang this way for exactly that reason, on walls far larger than yours, and nobody walks into a museum and thinks the walls look unfinished.

The practical version: on a 250 cm wall, a 100 cm canvas centred leaves 75 cm either side. That is a lot of nothing and it is correct. What is not correct is putting a small canvas on a wide wall and calling it the same thing — below about 40 percent of the wall width the eye starts reading the gap instead, and the painting shrinks. The zone between 40 and 55 percent is where a canvas is undersized rather than deliberate.

Height, which is the other half

Because the canvases are upright, width undersells them. A 120 × 100 cm canvas puts 1.2 square metres of image on a wall — more area than a 150 × 70 cm horizontal would, despite being 50 cm narrower.

Mass is what the eye weighs, not width. So on a wide wall, take the tallest size the room allows rather than the widest available, and the proportion problem gets a good deal smaller. The limit on that is the ceiling, and it is a hard limit: will a tall canvas fit this wall does that sum for 240, 260 and 280 cm ceilings.

The third constraint, and the one people forget entirely, is how far back you can stand. A 120 cm canvas on a wide wall in a narrow room is still a 120 cm canvas at 80 cm — viewing distance caps it independently of the wall. All three have to agree.

The paper test

Cut newspaper or brown paper to the exact size, tape it up, and leave it for a day. It costs nothing, it takes ten minutes, and it settles the question in a way that holding a tape measure against a wall never does.

Look at it from the doorway, from where you sit, and in the evening with the lights on. Most people move the paper once and then stop arguing about the size, and a fair number discover they want it bigger — which is the usual direction of the error.

Then take the size to the collection. Every painting is listed height × width, so the second number goes into the chart in section two. If your wall wants a 100 cm width, the largest part of the collection sits there: Riae (Blue Hair) is 100 × 100 cm and the only square canvas in the series.

Questions people ask

What size canvas do I need for a 3 metre wall?

The proportion asks for 165 to 225 cm across, and no upright canvas supplies that. On a wall that wide, a single canvas centred with empty wall either side works, or a canvas with furniture underneath it so the furniture carries the horizontal.

How much of a wall should a painting cover?

Between 55 and 75 percent of the usable wall width for a single piece. Below about 40 percent the eye starts reading the empty wall instead of the picture, and the canvas looks undersized rather than deliberate.

Why are all the paintings portrait format?

Because they are portraits of one person, and a standing figure wants a standing canvas. Sizes run from 50 by 30 to 120 by 100 cm, height first, and the widest is 100 cm. On a wide wall that means one canvas plus space rather than a bigger canvas.

Is it wrong to leave empty wall around a painting?

No, it is what makes a single figure hold attention instead of competing with the wall. A canvas that fills its wall gets looked at the way wallpaper does. The mistake is a small canvas on a wide wall, which is a different thing from a deliberate one.