Border

Thanks.

Every theme is different. Try some CSS like this. First, get the ID of the view. For example, for view ID 2:

.strong-view-id-2 .strong-content {
  border: 3px solid black;
  font-size: 20px;
}

And if you need to make the title larger:

.strong-view-id-2 .testimonial-heading {
  font-size: 30px;
}