What is the size of a 6-inch photo?

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 2.54x 12 = 30.5cm ... ID photos are generally one-inch photos, 2.5cm*3.5cm, and one-inch and two-inch photos are commonly used in daily affairs. Photographs taken by photography are generally five inches, and six inches are commonly used internationally.

Extended data:

There is also a commonly used method to indicate the size of a photo in the world, which is to take the integer value of the short side of the photo and add the letter R to indicate it. For example, a 5-inch photo, the specification is 5×3.5 inches, which is 3R. If you want to take a picture of a square, such as "3 inches x3 inches" and "5 inches x5 inches", we don't call it 3R, we call it 3S or 5S.

References:

Baidu Encyclopedia _ Photo Size