How much is five inches? What are the rules for calculating the size of photos?

How much is five inches? What are the rules for calculating the size of photos?


Don't listen to some people in front of you
Inch is not equal to "inch"
One inch = 3.3cm
One foot = 10 inches = 33 cm_ It's one third of a meter
One foot = 10 feet = 3.3 meters
5 inch photo = 33cm * 5 = 16.5cm