This is my CSS.
CSS
#hexagon-circle {
width: 100px;
height: 55px;
background: red;
position: relative;
borde
You can try this approach:
CSS
#hexagon-circle {
position: relative;
margin: 1em auto;
width: 10em;
height: 17.32em;
border-radius: 1em/.5em;
background: red;
transition: opacity .5s;
cursor: pointer;}
#hexagon-circle:before {
position: absolute;
width: inherit;
height: inherit;
border-radius: inherit;
background: inherit;
content: '';
-webkit-transform: rotate(60deg); /* Chrome, Opera 15+, Safari 3.1+ */
-ms-transform: rotate(60deg); /* IE 9 */
transform: rotate(60deg);} /* Firefox 16+, IE 10+, Opera */
#hexagon-circle:after {
position: absolute;
width: inherit;
height: inherit;
border-radius: inherit;
background: inherit;
content: '';
-webkit-transform: rotate(-60deg); /* Chrome, Opera 15+, Safari 3.1+ */
-ms-transform: rotate(-60deg); /* IE 9 */
transform: rotate(-60deg);} /* Firefox 16+, IE 10+, Opera */
DEMO
http://jsfiddle.net/yR7zt/4/