A living room wall is usually three to four metres long, and that changes the arithmetic. Most gallery walls that fail in a living room fail the same way: the frames are the right number but the wrong size, and a wall built from small formats reads as clutter from four metres away rather than as a composition.
How much of the wall the arrangement should cover
The two-thirds rule applies to furniture, not to walls. On a free wall with nothing underneath it, aim for the arrangement to span 60 to 70 per cent of the wall's length, leaving a clear margin at each end so the group has somewhere to stop.
| Wall length | Target span | Margin at each end |
|---|---|---|
| 300 cm | 180-210 cm | 45-60 cm |
| 350 cm | 210-245 cm | 53-70 cm |
| 400 cm | 240-280 cm | 60-80 cm |
That span is measured from the outer edge of the leftmost frame to the outer edge of the rightmost one, not between the images.
How many frames that actually is
Fewer than most people assume. With a 5 cm gap held constant, a single row works out like this:
| Arrangement | Total span | Suits a wall of |
|---|---|---|
| Four 50×70 in a row | 215 cm | 320-360 cm |
| Three 70×100 in a row | 220 cm | 320-370 cm |
| Two 100×140 side by side | 205 cm | 300-340 cm |
| Six 50×70 in two rows of three | 160 cm wide, 145 cm tall | 240-270 cm |
Six 30×42 in a row, by contrast, span only 205 cm but stand just 42 cm tall — a thin ribbon on a four-metre wall, dwarfed by the ceiling above it. Every format is listed in full in the poster size guide.
HILMA AF KLINT - THE TEN LARGEST, ADULTHOOD, NO. 7 PLAKAT
Bauhaus orange on blue poster
A Retrospective - Mark Rothko Poster
Pumpkin Forever - Yayoi Kusama Poster
Yayoi Kusama - Red Dots Poster
Bauhaus Woman 02 - David Wolf
Height matters more than width on a long wall
This is the part that catches people out. A wide arrangement that is short reads as a stripe. Once the wall is over three metres, the group needs vertical presence as well: either a format at least 70 cm tall, or two rows stacked. A two-row block of six 50×70 stands 145 cm tall and holds a large wall far better than eight small frames spread across the same width.
The smallest format that survives
On a wall this size, 21×30 should never be an outer frame. It can sit between larger pieces as a pause, but on the edge of an arrangement it reads as an afterthought, and from a sofa four metres away its image is simply not legible.
A practical floor: on a 300 cm wall or larger, at least half the frames should be 50×70 or bigger, and the anchor piece should be 70×100 or 100×140. The largest format has its own XL collection, and it is the one that most often solves a big wall on its own.
Anchor first, then build
Place the largest piece slightly off centre, hang it at the usual height — centre 145 cm from the floor, as set out in how high to hang art — and build outward from it, aligning the centres of the neighbouring frames with each other rather than their top edges.
Twelve layouts with their finished dimensions are set out in the gallery wall layout guide, and the motifs that suit the room are gathered in the living room collection.