As webtiki says, you can get this result adapting my previous answer (Even though may be it is a little bit difficult)
.container {
width:300px;
margin:5px;
}
.test
{
position: relative;
width: 300px;
height: 150px;
padding: 0px;
background: pink;
border-radius: 6px;
}
.test:after {
content: '';
top: 1px;
right: -29px;
position: absolute;
border: 0px solid;
display: block;
width: 38px;
height: 26px;
background-color: transparent;
border-bottom-left-radius: 50%;
border-bottom-right-radius: 50%;
box-shadow: -21px 9px 0px 8px pink;
}
<div class="container">
<div class="test"></div>
</div>
<img src="http://i.stack.imgur.com/MYlKY.png" alt="enter image description here">
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