CSS Stands for (Cascading Style Sheet).

1. font-size
2. font-family
3. font-weight
4. color
5. text-align
6. line-height

font-size defines the size of the text. Most popular units are px, rem, em etc.  Visit MDN for more. ffdsafd     font-size 2px 3px font-weight bold normal line-height 1.6 1.3