Editing Title of A Post

Hi,
if you want to change this font-size title for featured posts: https://screencast.com/t/815iv7FmCFn
use this code:
#featured-categories .feat-post h3 {
font-size: 20px;
}

If you want to change this font-size title: https://screencast.com/t/y32dKkCO
use this code:
#featured-categories .more-posts .post .right h5 a {
font-size: 20px;
}

Best Regards