Image Sizes:

•16x20 at least 1600 pixels x 2000 pixels

•20x24 at least 2000 pixels x 2400 pixels

•20x30 at least 2000 pixels x 3000 pixels

•24x36 at least 2400 pixels x 3600 pixels

•30x40 at least 3000 pixels x 4000 pixels

•36x48 at least 3600 pixels x 4800 pixels