CSS unit Length and value

1, Pixel px: One of the most commonly used length units, which is generally related to the resolution of the screen, refers to a point on the monitor (the smallest unit).

2, EM: Relative length units, relative to the size of the parent element.

3, REM: relative length units, relative to the root element size.

4, deg: angle units, degrees.

5, Rad: Radian units.

6, Grad: gradient positioning.

7, Hz: Frequency units.

8, S: Time units, including MS and so on.

9, percent%

CSS unit Length and value