Just because it looks great and is readable on YOUR screen, doesn’t mean that’s the case for your viewers. I like to stick with 14-16 point text for emails and web, and about 28-32 for PowerPoint/Keynote presentations being viewed on large-screen HDTVs. Anything smaller and you run the risk of your carefully crafted text being unreadable. There are exceptions, of course—but I almost always stick with those sizes.
Font sizes for the web: It’s all about the x-height
There’s actually a science behind the best font size for the web. There’s a lot of geeky gibberish in the article (which I personally found interesting), so if you don’t care about all that just scroll down to the bottom of the article and you’ll find a chart of recommended sizes for desktop, laptop, phone and TV viewing.
I did a search for the original title of the article and found it (link has been updated in the article). Interesting that the original Medium article was deleted completely.
“The author has deleted this Medium story.”