What do you mean by "the larger font set"?
It is the same font as other fields and the text of the page, and (should) becomes larger when you change the text size in your profile (not the management page setting).

When releasing the new version last week I briefly increased its size, but afterwards I changed it back (when tweaking a little the field sizes, to address complains), thinking there was no reason why specifically that one would be bigger.
In the old version of the site, it was depending on the OS/browser, like other fields, so for some it was bigger and for others it was a similar size.