There will be font size options in pro soon, but not individually for the featured post/rest of the posts.
This CSS should help though:
Featured posts:
.featured-column .wp-show-posts-entry-title {
font-size: 25px;
}
.featured-column .wp-show-posts-entry-meta {
font-size: 13px;
}
.featured-column .wp-show-posts-entry-summary,
.featured-column .wp-show-posts-entry-content {
font-size: 17px;
}
Regular posts:
.wp-show-posts-entry-title {
font-size: 25px;
}
.wp-show-posts-entry-meta {
font-size: 13px;
}
.wp-show-posts-entry-summary,
.wp-show-posts-entry-content {
font-size: 17px;
}
Hope this helps 🙂