<div class="box"></div>
.box {
	width: 300px;
	height: 300px;
  margin: 25px auto;
	background: black url(https://ununsplash.imgix.net/photo-1415302199888-384f752645d0?q=75&fm=jpg&s=823bdcc1b7ad955f5180efd352561016);
  background-size: cover;
	-webkit-clip-path: polygon(50% 0%, 63% 38%, 100% 38%, 69% 59%, 82% 100%, 50% 75%, 18% 100%, 31% 59%, 0% 38%, 37% 38%);
clip-path: polygon(50% 0%, 63% 38%, 100% 38%, 69% 59%, 82% 100%, 50% 75%, 18% 100%, 31% 59%, 0% 38%, 37% 38%);
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.