A 4-inch photo is 10 times 7.6 cm. Generally speaking, the inch here refers to inches, 1 inch = 2.54 cm. How many inches refer to the length of one side of the photo, that is, 2.45 & times; 4 = 10.16 cm. But now 4 inches are rarely used. They are basically 5 inches. There is no difference in their resolution, but the size is different.
With the development of modern life, we need our own photos whether we are looking for a job or taking ID cards. Sometimes it is 1 inch, sometimes it is 2 inches, and there are 4 inches. How much is this inch here and how big is the 4-inch photo?
Generally speaking, the size of the photo is measured in inches. According to the regulations, 1 inch = 2.54 cm. Usually, the inch refers to the inch length on one side of the photo. Therefore, the length of a 4-inch photo is 2.45 & times; 4 = 10.16 cm.
Therefore, we usually record 4-inch photos as 10 by 7.6cm, but now basically 4-inch photos are rarely used. Instead, 5-inch photos are replaced, that is, 12.7 by 8.9cm. These sizes basically have nothing to do with the photo resolution, but they are different in size.