change text size and ofnt in css code example

Example 1: css change text size

p {
	font-size: 150% /*px, cm, in, etc.*/; 
}

Example 2: how to change text size in css

.class{
  	font-size: 100%;
}

.class{
  	font-size: 20em;
}

.class{
  	font-size: 20px;
}

.class{
  	font-size: 20pt:
}