Page Titles Font Size

Sorry if I’ve missed this elsewhere but please tell me where I find the css for changing the size of the font for the pages title(s)
Many thanks in advance

You can change font size by adding this code to Appearance - Theme Options - Other - Custom CSS

.entry-title a {
  font-size: 30px;

Just make sure to change font size to one that you would like to use.

Let me know if this helps.