What is the width at which a 3.5 cm x 5.2 cm (width) image can be displayed? — Untold Post As a practical matter the answer is that the image width must be less than 10 percent of the screen height. Hence, for a 2560×1200 high resolution display, the size in pixels for the image must be less than 10% of the screen height. 446.5 × 297.2 = 1.2 × 6.5 × 8.5 in — Untold Post As a practical matter, a 3.5 cm × 5 cm image is not displayable. Hence, the size in pixels of these images is 1.2 × 6.5 × 8.5 in, and therefore the resolution must be in that range. However, we see that when we say pixels, we do not count all the dots. For example, a 1024×1024 pixel image with an aspect ratio of 16:9 may be seen as having 32,768 pixels (32,768 per inch = 1,366,216 pixels / inch), so the overall image should probably be sized at more than one pixel per inch (e.g. 1.2 × 6.5 × 8.5 in).