how to increase the size in mark down code example

Example 1: markdown: text size

<font size="1"> This is my text number1</font> 

 <font size="2"> This is my text number 2 </font>
 
 <font size="3"> This is my text number 3</font> 
 
 <font size="4"> This is my text number 4</font> 
 
 <font size="5"> This is my text number 5</font> 
 
 <font size="6"> This is my text number 6</font>

Example 2: font size markdown

<font size=1> This is my text number1</font> 

 <font size="2"> This is my text number 2 </font>