What are the measuring units of a smartphone?
When talking about the outer dimensions of a smartphone, we will be considering the length (how long the smartphone is), the width (how wide the smartphone is) and the thickness (how thick the smartphone is, i.e, the length from the base to the top).
And dimensions of smartphones are measured in millimeters or inches. But in most cases, you may encounter a different measuring unit rather than millimeter or inches. Even if you do, it will be the equivalent value of the measurement in millimeters or inches.
Assuming the dimension of a smartphone is 70mm x 50mm x 4.1mm, it means that such smartphone is 70 millimeters long, 50 millimeters wide and 4.1 millimeters thick.
See also: Earphone Jack