The single most common regret with wall art is going one size down. On a screen a 16″ × 12″ canvas looks generous; on a living-room wall it reads as a postcard.
The rule of thumb
A single piece should fill roughly two thirds of the width of whatever it hangs above — a sofa, a bed, a sideboard. Measure the furniture, take two thirds, and pick the nearest size up rather than down.
The six sizes
- 16″ × 12″ — shelves, alcoves, gallery walls made of several pieces.
- 24″ × 16″ — hallways and smaller bedrooms.
- 30″ × 20″ — the safe default above a desk or a chest of drawers.
- 36″ × 24″ — above a two-seater sofa or a double bed.
- 40″ × 30″ — a proper feature piece on a full wall.
- 48″ × 32″ — statement scale; check your stairwell before ordering.
Rolled, 18mm or 38mm
Rolled arrives in a tube and needs framing locally — cheapest, and the right choice if you already have a frame in mind. The 18mm box frame is the standard stretched canvas and sits close to the wall. The 38mm depth throws a shadow line and reads as more substantial, which suits the larger sizes.