Cap font-size in a container ? (think max-width/max-height)

Here's the situation. I'll have a container with a bunch of links in it, a tag-cloud I guess it's called.



If you look at that, you'll see "34pt", which is fairly large as far as font-sizes go. This number is automaticly generated in relation to the number of posts labeled as such.

Now I could easily work around this on the server-side or with JS, but given there's a "max-width" and a "max-height" in CSS for dimensions, I can't help but wonder if there's something similar for font-sizes.