A CodePen by Isaka.

index.html

<!-- An adaptation of http://css-tricks.com/examples/ShapesOfCSS/ -->
<div class="chevron">
</div>

style.css

.wrap {
  width: 50px !important;
  height: 100px
  margin: 0 auto;
  background-color: gray;
}

.chevron {
  position: relative;
  text-align: center;
  padding: 0.5px;
  margin: 0px auto;
  height: 0.5px;
  width: 20px;
}

.chevron:before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 50%;
  background: red;
  -webkit-transform: skew(0deg, 20deg);
  -moz-transform: skew(0deg, 30deg);
  -ms-transform: skew(0deg, 30deg);
  -o-transform: skew(0deg, 30deg);
  transform: skew(0deg, 30deg);
}
.chevron:after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  width: 50%;
  background: red;
  -webkit-transform: skew(0deg, -20deg);
  -moz-transform: skew(0deg, -30deg);
  -ms-transform: skew(0deg, -30deg);
  -o-transform: skew(0deg, -30deg);
  transform: skew(0deg, -30deg);
}