Font size in newsletters

The font size in the newsletters, when read on a phone, is extremely small. I don’t want readers to have to click through to the website just to be able to read it. I’m using the Caspar theme. Does anyone know how to increase the size to something more readable?

Which version of Ghost are you running and which email client are you viewing the emails with? There were issues with some versions of 3.x and gmail that resulted in text appearing smaller than intended.

I’m not sure how to find out what version I’m using, but I only started using it a few weeks ago, so I imagine it’s the latest? I’ve been using gmail.