phenergan:

malign-sensualism:

4” x 6”        (600 pixels x 900 pixels)
5” x 7”        (750 pixels x 1050 pixels)
6” x 6”        (900 pixels x 900 pixels)
8” x 10”      (1200 pixels x 1500 pixels)
8.5” x 11”   (1275 pixels x 1650 pixels)
11” x 14”    (1650 pixels x 2100 pixels)
12” x 12”    (1800 pixels x 1800 pixels)
12” x 16”    (1800 pixels x 2400 pixels)
16” x 20”    (2400 pixels x 3000 pixels)
18” x 24”    (2700 pixels x 3600 pixels)
19” x 13”    (2850 pixels x 1950 pixels)
20” x 24”    (3000 pixels x 3600 pixels)
24” x 24”    (3600 pixels x 3600 pixels)
12” x 36”    (1800 pixels x 5400 pixels)
24” x 36”    (3600 pixels x 5400 pixels)            

These are the sizes for 100DPI, the bare minimum (and industry standard) for decent printing should be 300. Not entirely sure what OP was thinking but here is the above sizes at 300DPI:

4” x 6”        (1200 pixels x 1800 pixels)
5” x 7”        (1500 pixels x 2100 pixels)
6” x 6”        (1800 pixels x 1800 pixels)
8” x 10”      (2400 pixels x 3000 pixels)
8.5” x 11”   (2550 pixels x 3300 pixels)
11” x 14”    (3300 pixels x 4200 pixels)
12” x 12”    (3600 pixels x 3600 pixels)
12” x 16”    (3600 pixels x 4800 pixels)
16” x 20”    (4800 pixels x 6000 pixels)
18” x 24”    (5400 pixels x 7200 pixels)
19” x 13”    (5700 pixels x 3900 pixels)
20” x 24”    (6000 pixels x 7200 pixels)
24” x 24”    (7200 pixels x 7200 pixels)
12” x 36”    (3600 pixels x 10800 pixels)
24” x 36”    (7200 pixels x 10800 pixels)