[texhax] query font size in document

[Uwe Lück]

Am Mittwoch, den 02.01.2013, 00:40 +0100 schrieb Martin Schröder:
> 2013/1/1 Dr A K Hannaby <keith_hannaby at mathshelp.com>:
> > In Latex, is there a construction to (temporarily) query what is the font
> > size currently being used?
> 
> Why do you need this?

Good question, cf.

    http://catb.org/~esr/faqs/smart-questions.html#goal

"Describe the goal, not the step".

Before, the OP complained that \infty appears too small. 
He may be trying to assign a different size to it 
referring to \f at size, maybe reinventing the relsize package:

    http://ctan.tug.org/pkg/relsize

It would be interesting whether \larger{\infty} makes a 
(pleasing) difference. 

Good LuX,

    Uwe.