Latex also allows includes a tag to change the font size. Below is the expression 1 + 1 = 2 in each of the sizes.
\large 1 + 1 = 2\(\tiny 1 + 1 = 2\)
tiny
\(\scriptsize 1 + 1 = 2\)scriptsize
\(\small 1 + 1 = 2\)small
\(\normalsize 1 + 1 = 2\)normalsize
\(\large 1 + 1 = 2\)large
\(\Large 1 + 1 = 2\)Large
\(\LARGE 1 + 1 = 2\)LARGE
\(\huge 1 + 1 = 2\)huge
\(\Huge 1 + 1 = 2\)Huge