You could try the following code in your child theme’s style.css:
#comments .comment-body {
font-size: 12;
}
The font-size is normally set to 16px.
I should say that my advice is based on the demo site for the twenty eleven theme on wordpress.com.
Unfortunately, it didn’t work — but I’m a newbie, so it could be clashing with something else in my child theme.
Is your site online? It would be easier if I could check the actual website.
Try this but I am not sure without checking your site:
#comments .comment .comment-body {
font-size: 12;
}
or
#comments ol .comment-body {
font-size: 12;
}
I am sorry, I forgot to put ‘px’ (= pixels) behind ’12’… So try the first one again modified like this (I set it to 10):
#comments .comment-body {
font-size: 10px;
}
