change font size in top feature

How can I change the font size in the Top Feature heading and Top Feature description?

 

Hello,

Paste the code given below in Custom CSS section
(Appearance -> Theme Options -> Styling Options -> Custom CSS) of your dashboard.

Code:

.slider_info h1 a {
font-size: 50px;
}
.slider_info p {
font-size: 25px;
} 

You can change the value of "font-size" as per your requirement.
This will solve your issue.