How to Choose the Right Poster Size for Any Room

The single biggest mistake in styling a wall is going too small. A print that looks generous on screen can feel like a postage stamp once it’s up. Here’s how to size wall art with confidence.

Start with the wall, not the print

As a rule of thumb, art should fill 60–75% of the available wall width — the space above a sofa, bed or console, not the whole room. Measure that width, multiply by 0.66, and you have your target artwork width (including frame).

Common sizes and where they work

• A3 (30×42cm) — desks, nooks, tight hallways, or as part of a cluster.
• A2 (42×59cm) — the everyday hero size; great over a bedside or in a gallery wall.
• A1 (59×84cm) — a statement over a sofa, bed or dining sideboard.
• 50×70cm — the popular “Scandi” size; pairs beautifully in twos and threes.

Think in ratios, not just centimetres

Portrait 2:3 and 3:4 suit most rooms; square works for symmetrical spots and grids; landscape suits wide walls. When you design a custom poster you pick the orientation up front so it’s framed right from the start.