[Plugin: Register Plus Redux] html usage for Email and Admin Verification font size

I’m almost set, but the font size on the Admin Verification is too small. I tried to enlarge it with <font size=”4″>Your account will be reviewed by an administrator and you will be notified when it is activated.</font>, but that does not do the trick. What am I doing wrong? Thanks in advance.

https://www.ads-software.com/extend/plugins/register-plus-redux/