Most cameras have either a 3:2 ratio (35mm full frame and APS-C sensors) or 4:3 (Most compact cameras and Micro Four Third sensors). Depending on your desired print size, you may need to crop the image to the appropriate ratio to make the print look the way you want it to.
Common print sizes in a 3:2 ratio (in inches):
- 4×6, 6×9, 8×12, 12×18, 16×24, 20×30, 24×36
Common print sizes in a 4:3 ratio: (in inches):
- 6×8, 9×12, 12×16
Other common ratios include:
- 1:1, 5:4, 16:9, 12×6