How can I change the font size of index entries?

[Christian Liesen]

Hi,

I am looking for an easy way such as
\renewcommand

to change the font size of index entries (scrbook). Does anyone know how 
to do this?

I've read through all kinds of stuff now, including this: 
http://www1.ku-eichstaett.de/urz/schriften/makeidx.pdf and the makeindex 
and scrbook documentation, but I still don't have a clue.

Many thanks,
-- Christian