Text objects & font size

I could use some pointers re: text object font sizing. I’m trying to generate a scene that includes text from external sources which provides the font name and size in points but am getting stuck on how to come up with some sort of consistent mapping from point size to a Blender font size. What does the size parameter for a font in Blender actually represent? Given a text object with a size of 1.0, the size of the text drawn appears to vary depending the font being used. Since the source data usually doesn’t have a bounding box for the text, it’s making it difficult to come up with a way to translate it into consistent Blender font sizes that preserves the overall layout of my source data.

Here’s a screenshot illustrating what I’m talking about…