The size of the 6-inch photo is15.2cm *10.2cm.

The size of the photo is in inches, 1 inch =2.54cm, and usually x inch refers to the inch length of the long side of the photo.

Extended data

Usually, the specifications of photos are expressed in inches, which is different from the diagonal length of products such as monitors. The "several inches" in photos refers to the inch length of the long side of photos.

For example, a 6-inch photo means a 6×4-inch photo. There is also a common method to express the size of a photo in the world, that is, take the integer value of the short side of the photo and add the letter R to express it. For example, a 6-inch photo has a specification of 6×4 inches, that is, 4R.

Generally, the ratio of photos taken by digital cameras is 4: 3, while the ratio of enlarged photos is about 3: 2. Therefore, when photos of digital cameras are enlarged, the ratio of photos should be cut to about 3: 2, so that the enlarged photos are just full of the whole photographic paper.

ID cards, physical examination forms, etc. are mostly 22×32mm small, 26mm×32mm second-generation ID cards, and 25mm×35mm ordinary one-inch photos. The standard photo size of passport and travel document is 48mm×33mm, the head width is 21mm ~ 24 mm, and the head length is 28 mm ~ 33 mm.

References:

Photo size-Baidu Encyclopedia