Hello @HCAF ,
At this time, if you're unable to directly paste in size 15 text to your email from an outside source, the only workaround would be to use a similar size like 14 or 16. I've submitted your feedback to the engineers, and they'll notify you directly if and when they have an update.
Hi @HCAF. Upvote this thread: https://community.constantcontact.com/t5/Email-Campaign-Experience/More-Font-Sizes/idc-p/359094#M115...