Fixed physical standards.
ISO and US paper names define a trim size, not one fixed pixel size. Pixels appear only after a PPI target is chosen.
Calculate a paper size →12 physical-size references
Paper and Photo Size Reference
Browse exact trim dimensions, compare aspect ratios and see the pixels needed at 300 PPI. Every reference also includes a calculator for other resolutions.
Fixed sizes with crop decisions.
A 4 × 6, 5 × 7 or 8 × 10 print also has a physical size, but their different aspect ratios can remove part of a camera image.
Preview a photo crop →Browse by category
ISO A-series paper
International paper formats with the consistent 1:√2 proportion.
US paper sizes
Letter and Legal office formats defined in inches.
Photo print sizes
Common lab and frame formats, each with its own crop ratio.
4 × 6
Photo
↗5 × 74 × 6 photo
101.6 × 152.4 mm · 2:3
1200 × 1800 px at 300 PPIPhoto
↗8 × 105 × 7 photo
127 × 177.8 mm · 5:7
1500 × 2100 px at 300 PPIPhoto
↗11 × 148 × 10 photo
203.2 × 254 mm · 4:5
2400 × 3000 px at 300 PPIPhoto
↗12 × 1811 × 14 photo
279.4 × 355.6 mm · 11:14
3300 × 4200 px at 300 PPIPhoto
↗16 × 2012 × 18 photo
304.8 × 457.2 mm · 2:3
3600 × 5400 px at 300 PPIPhoto
↗16 × 20 photo
406.4 × 508 mm · 4:5
4800 × 6000 px at 300 PPIPixels are a choice
The same paper needs different pixels at different PPI.
Use these values as planning targets, not universal printer guarantees.
150 PPI
A practical planning level for some larger prints viewed farther away.
240 PPI
A strong intermediate target when the source file cannot reach 300 PPI.
300 PPI
Often requested for detailed prints viewed closely; confirm with the provider.
Check before you print
Check an image →Use the image, not a guess.
Run the source pixels against the exact size you plan to order.