Edit in JSFiddle

.stitched {
position: relative;
    border:2px dashed #fff;
    background: #ff0030;
    width: 356px;
    height: 40px;
    margin: 10px 10px 10px -5px;
    box-shadow: 0 0 0 8px #ff0030;
    line-height: 120px;
    text-align: center;
    -moz-box-shadow: 0 0 0 8px #ff0030;
    -webkit-box-shadow: 0 0 0 8px #ff0030;
    z-index: 10;
}

.stitched:after {
    content:"";
    position:absolute;
    border-bottom:14px solid transparent;
    border-right:0px solid transparent;
    border-left:14px solid transparent;
    border-top:14px solid #99001D;
    margin-top:49px;
    left: -9px;
    background: transparent;
    z-index: -1;
}
.stitched:before {
    content:"";
    position:absolute;
    border-bottom:14px solid transparent;
    border-right:14px solid transparent;
    border-left:0px solid transparent;
    border-top:14px solid #99001D;
    margin-top:49px;
    right: -9px;
    
    z-index: -1;
}
.parent1 {
    border:1px solid #000000;
    background: #FCFCFc;
    width: 350px;
    margin: 20px;
    height: 350px;
    box-shadow: 0 0 0px 8px #FAFAFA;
    line-height: 120px;
    text-align: center;
    -moz-box-shadow: 0 0 20px 2px black;
    -webkit-box-shadow: 0 0 20px 8px black;
}
.stitched2 {
    border:2px dashed #fff;
    background: #ff0030;
    width: 356px;
    position: relative;
    height: 40px;
    margin: 10px 10px 10px -5px;
    box-shadow: 0 0 0 8px #ff0030;
    line-height: 120px;
    text-align: center;
    -moz-box-shadow: 0 0 0 8px #ff0030;
    -webkit-box-shadow: 0 0 0 8px #ff0030;
    z-index: 10;
}
.stitched2:after {
    content:"";
    position:absolute;
    border-top:14px solid transparent;
    border-right:0px solid transparent;
    border-left:14px solid transparent;
    border-bottom:14px solid #99001D;
    top:-37px;
    left: -10px;
    background: transparent;
    z-index: 1;
}
.stitched2:before {
    content:"";
    position:absolute;
    border-top:14px solid transparent;
    border-right:14px solid transparent;
    border-left:0px solid transparent;
    border-bottom:14px solid #99001D;
    top:-37px;
    right: -10px;
    background: transparent;
    z-index: 1;
}

<div class="parent1">
    <div class="stitched">&nbsp;</div>&nbsp;
    <div class="stitched2">&nbsp;</div>
</div>