What Aspect Ratio Is 16×20? (Plus 8×10, 11×14, 5×7, A4)
Searching a frame size to find its ratio? 16×20 is 4:5 — and it shares that shape with 8×10 and 4×5. Here's the full reverse-lookup for every size buyers ask about.
When a buyer asks "does this come in 16×20?", they're really asking about a shape. 16×20 is a 4:5 ratio, so any 4:5 file prints it. Here's every common size mapped to its ratio.
Reverse-lookup chart
| Frame size | Aspect ratio | Same-shape sizes |
|---|---|---|
| 4×6 | 2:3 | 8×12, 12×18, 16×24, 24×36 |
| 5×7 | 5:7 | (its own shape) |
| 8×10 | 4:5 | 4×5, 16×20 |
| 16×20 | 4:5 | 4×5, 8×10 |
| 11×14 | 11:14 | (close to but not 4:5) |
| 9×12 | 3:4 | 6×8, 12×16, 18×24 |
| 18×24 | 3:4 | 6×8, 9×12, 12×16 |
| 24×36 | 2:3 | 4×6, 8×12, 12×18, 16×24 |
| A4 | ISO A (≈1:1.41) | A5, A3, A2, A1 |
Why this matters for your listings
If you sell a 4:5 file, you can advertise 4×5, 8×10 and 16×20 from that one file — they're the same shape at different scales. But 11×14 is not 4:5 (it's slightly different), so it needs its own file. Mixing these up is the #1 cause of "it doesn't fit my frame" messages.
The sizes worth offering
To cover essentially every frame on the market, provide one master per ratio: 2:3, 3:4, 4:5, 5:7, 11:14, and ISO A. Six files, every frame.
Generate them in one step
Drop your image into the free Ratio-Pack Generator and it produces a correctly-proportioned master for each ratio at 300 DPI — so a single design covers 16×20, 8×10 and every other size in one download.
Ratio-Pack Generator
Turn one image into every print ratio buyers ask for — 300 DPI, cropped in your browser. Free, instant, nothing uploads.