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 width is 2.54x5 =12.7cm; 12 inch means that the width of the photo is 2.54x12 = 30.5cm.?

Common photo sizes are: one inch smaller (2.2*3.2cm), one inch (2.5*3.5cm), one inch larger (3.3*4.8cm), two inches (3.5*4.5cm), two inches (3.5 * 4.5cm) and three inches (6*8.9cm).

In China, many ID photos are one inch 25mm×35mm. Such as graduation photo, employment certificate, motor vehicle driver's license, etc. They are all 1 inch.

Extended data:

The size of photos is usually in inches, 1 inch ≈2.54 cm. An x-inch photo means that the long side of the photo is x-inch. For example, the length of a 12 inch photo is 2.54x12 = 30.5cm. ..

Other photo sizes:

The photo size of 1 and 5 inches is 5x3.5, 12.7*8.9, 1200x840 or more, 1 ten thousand pixels.

2.6-inch photo size is 6x4, 15.2* 10.2, 1440x960 or more,10.3 million pixels.

The size of the 3.7-inch photo is 7x5, 17.8 * 12.7, 1680x 1200, with 2 million pixels.

4.8-inch photo size: 8x6,20.3 *15.2, 1920x 1440 or more, 3 million pixels.