Poster Sizes Explained — All 10 Sizes, to Scale

Poster sizing goes wrong in one direction: too small. A print that looked generous on a product page floats, lost, on a real wall. This guide gives you the ten sizes in this catalog, what each is honestly for, and a scale visualiser so you can see the difference before you spend.

The ten sizes

Size (in)	Metric	Shape	Unframed	Framed	Best use
5 × 7 in	12.7 × 17.8 cm	5:7	$36	$55	Desks, shelves, and the small end of a gallery wall
8 × 10 in	20.3 × 25.4 cm	4:5	$37	$60	Desks and dressers; pairs well in grids of four
8 × 12 in	20.3 × 30.5 cm	2:3	$37	$65	Narrow spots — beside doors, between windows
11 × 14 in	27.9 × 35.6 cm	11:14	$40	$70	Reading chairs and small walls; a grown-up desk print
12 × 18 in	30.5 × 45.7 cm	2:3	$41	$75	The all-rounder — living rooms, bedrooms, first posters
16 × 20 in	40.6 × 50.8 cm	4:5	$46	$80	Above a dresser or console; gallery-wall anchor, small end
18 × 24 in	45.7 × 61.0 cm	3:4	$50	$90	Above sofas and beds with room to breathe
20 × 28 in	50.8 × 71.1 cm	5:7	$56	$100	Statement size for mantels and feature walls
24 × 36 in	61.0 × 91.4 cm	2:3	$64	$125	The anchor — see its own guide below
28 × 40 in	71.1 × 101.6 cm	7:10	$69	$140	Maximum impact — large rooms, high walls

Prices are the merchant's for every design (spot-checked 15 October 2026); framed means any of the four finishes, which cost the same. Every size is a portrait — the first number is the width.

Why the shape matters as much as the size

The ten sizes fall into six different shapes. Within one shape, a design scales up or down unchanged; across shapes, the artwork has to be fitted differently — a 4:5 print (8×10, 16×20) is squarer than a 2:3 print (12×18, 24×36). Before you buy, open the merchant's page at your chosen size to see how the design sits on it. For a gallery wall, choosing sizes from the same shape family keeps edges and margins consistent.

Shape	Catalog sizes
2:3	8×12, 12×18, 24×36
5:7	5×7, 20×28
4:5	8×10, 16×20
11:14	11×14
3:4	18×24
7:10	28×40

Ready-made frames are easiest to find in the most common photo and poster sizes; the less common ones (such as 8×12 and 20×28) can take longer to source. If you are framing yourself, check frame availability before choosing the print size — or choose it framed from Cozy Spirit Studio, where all ten sizes come framed at the prices above.

See them to scale

On a 7 ft wall, next to a 5′6″ figure

Tap a size. The jump from 12×18 to 18×24 is the one most people underestimate.

Three working rules

Art above furniture should span roughly two-thirds of the furniture's width. Because every print here is a portrait, a 60in sofa (~40in of art) is best served by a pair — two 18×24s with a 3in gap span 39in; even the largest single print, 28×40, is only 28in wide. The couch planner does this arithmetic for any width.
Pairs and grids beat one mid-size print on big walls. Two 18×24s with 2–3in between them read as one deliberate composition.
When in doubt, go one size up. In this catalog the step from 12×18 ($41 unframed) to 18×24 ($50) is $9 — the cheapest drama in decorating.

Ready to apply it? The size calculator takes your wall measurements and returns the sizes that fit.