The blurb image is usually a square image. To make it round like this:

{width="6.25in" height="2.5104166666666665in"}

css-blurb
line-height: 0;
-webkit-border-radius: 100px;
-moz-border-radius: 100px;
border-radius: 100px;
overflow: hidden;
xmax-width: 200px;
margin: 0 auto 50px;