bbPress.org

Hi,
If you are having a small font for bbPress, then most probably your theme is having a standard small font size. CSS is indeed an option to go, but you will have to check in your environment where you have to copy this part. It might be something like:

#bbpress-forums .bbp-topic-content,
#bbpress-forums .bbp-reply-content  {
  font-size: 16px;
}

Otherwise you might try plugins like ‘bbp style pack’ to help styling your forum
Pascal.