Fist let me tell you that the font size will only work for the first twenty-seven characters, and the HMTL (hyper text mark up language) will be apparent when the post is opened and read.
Font Sizing Instructions:
There must be a "period" in front of the Font Tag code for it to work.
After submitting the post with the code, click on the Edit button and submit the post again to Turn On the font code.