Standard photo sizes

These are photo print sizes derived from 35mm film format (36 x 24mm) with an aspect ratio of 3:2 and large-format (4x5) film format. The standard ratio for 35mm negatives correspond directly to 4 x 6 inch (4R), 8 x 12 inch (S8R), 12 x 18 inch, 16 x 24 inch and 20 x 30 inch. It's also fairly close to 5 x 7 inch (5R) and 3.5 x 5 inch (3R). 3R (3.5 x 5 inch); 4R (4 x 6 inch); 5R (5 x 7 inch); 8R (8 x 10 inch) from 4x5 film negatives; S8R (8 x 12 inch); 11 x 14 inch close to 4x5 film negatives; 12 x 18 inch; 16 x 20 inch from 4x5 film negatives; 16 x 24 inch; 20 x 24 inch close to 4x5 film negatives; 20 x 30 inch