How do I obtain the current font size and baseline skip of a beamer font?

I’m creating a document using the document class beamer for the first time. The title is a little bit too large and I would like to decrease the font size slightly. I’ve figured out that I can change the font using setbeamerfont{title}{size*={<font size>}{<baseline skip>}}. However, rather than setting the font size and baseline skip to fixed values, I would like to change them relatively to their current values. So, is there a way to figure out what their current values are?