Setting of font size is always a big problem for blogger. We always found some blog having very small font or some blogger having very large font. In both of condition visitors Say thank and click on close button. They can’t see how your blog are interesting or not they directorial close your blog if they have any problem on your blog. In the web site you can see they have solution but in blog till today you don’t have any solution and I am giving you a solution a small piece of code for increasing and decreasing blog font size.