CSS supports the following Measurement Units

1. % :- This is % symbol used when we want to give a measurement as a percentage.

      e.g:-div{width:100%;}
   

2. cm :-An abbreviation of centrimeters is cm and it is used when we want to give a measurement in centimeters.

       eg:-p{margin-bottom:20cm;}
   

3. em :- An em unit is equivalent to the size of the font given, if you give a font 12pt, each "em" unit would be 12pt; thus, 2em would be 24pt.

      eg:-h2 {letter-spacing: 7em;}
   

4. ex :- It is measurement unit used when we want to give measurment relative to a font's x-height.This x-height is determined by the height of the font's lowercase letter x.

   eg:- p {line-height: 3ex;}
   

5. in :-An abbreviation of inches is in and it is used when we want to give a measurement in inches.

       eg:-p {margin-bottom:20in;}
   

6. mm :-An abbreviation of millimeters is mm and it is used when we want to give a measurement in millimeters.

       eg:-div {padding-bottom:20mm;}
   

7. pc :- An abbreviation of picas is pc and it is used when we want to give a measurement in picas.

      eg:-h2 {font-size: 7pc;}
   

8. pt :- An abbreviation of points is pt and it is used when we want to give a measurement in point. It is defined as 1/72nd of an inch.

     eg:-h2 {font-size: 7pt;}
   

9. px :- An abbreviation of pixels is px and it is used when we want to give a measurement in screen pixels.

       eg:- span{width:12px;}