Some of the most common sizes for printing digital images include: Print size in inches (millimeters). 3 x 5â³ (9cm x 12cm). 3Â½ Ã 5â³ (89 Ã 127mm). 4Ã5â³ (102 x 127mm). 3Ã5â³ (76 x 127mm). 4 x 6â³ (102 Ã 152mm) â This is the most commonly used print size by U.S. and Canadian consumers. 4 1/2 x 6â³ â size matches the 4:3 aspect ratio found on most Point & Shoot digital cameras.