What is the most suitable pixel ratio for photos?

There are many pixel ratios in a 3:4 picture size, such as 600*800px, 750* 1000px, 900* 1200px, etc.

Extended data:

The size of the photo is in inches, 1 inch =2.54cm, and usually x inches refers to the inch length of the long side of the photo. For example, 5 inches means that the photo length is 2.54x5 =12.7cm; 12 inch means that the length of the photo is 2.54x12 = 30.5cm. ..

1 pixel

Pixels are made up of small squares of an image, which have definite positions and assigned color values. The color and position of the small squares determine the appearance of the image. Pixels can be regarded as indivisible units or elements in the whole image. Indivisible means that it cannot be divided into smaller units or elements. It exists in a single color cell. Each dot matrix image contains a certain number of pixels, which determine the size of the image on the screen.

2. Pixel value

The pixel mentioned by the camera actually refers to the maximum pixel, which is the unit of resolution. This pixel value is only the effective maximum resolution supported by the camera.