Changing size

Hi – Is it possible to change the size?

I’ve tried something like

div.rotatingtweet, div.rotatingtweet a {
font-family:'avantgarde_ceregular';
font-size: 38px
}

but it only changes the size of the info about the tweet, not the tweet itself.

http://www.aaronzimmer.com/twitterhome/

https://wordpress.org/plugins/rotatingtweets/