The font-size property is used to increase or decrease the font size. The font-size property is used to control the size of fonts. Possible values could be xx-small, x-small, small, medium, large, x-large, xx-large, smaller, larger, size in pixels or in %.
<html> <head> </head> <body> <p style = "font-size:15px;">This font size is 15 pixels</p> <p style = "font-size:small;">This font size is small</p> <p style = "font-size:large;">This font size is large</p> </body> </html>