When we say 1-inch or 2-inch photo, what measurement do we mean?

1-inch 2.5*3.5cm 413*295

Identity card mugshot 3.3*2.2cm 390*260

2-inch 3.5*5.3cm 626*413

Small 2-inch (passport) 4.8*3.3cm 567*390

Large one-inch is a small two-inch photo

The so-called one-inch photo is based on the paper photo after printing or printing, the size of one-inch paper photo is: 2.5×3.5cm. The pixels of a one-inch digital photo, on the other hand, can be an arbitrary number due to the resolution.

Pixel = resolution x size

If the resolution is 72/inch (28.346/cm) the pixel is: 71 x 99

If the resolution is 350/inch (137.795/cm) the pixel is: 344 x 481

To make an electronic photo, the requirements of each department are different, and it is necessary to know the resolution, and if there is no requirement on the resolution has no requirements, then you can set any setting in the range of 72 - 350 / inch, or the default resolution of the digital photo 72 / inch to produce.