.side-corner-tag {
    position: relative;
    color: #fff;
    display: inline-block;
    padding: 5px;
    overflow: hidden;
    font-family: Arial, sans-serif;
    font-weight: 900;
}
 
.side-corner-tag p {
    display: inline;   
}

.side-corner-tag p span {
    position: absolute;
    display: inline-block;
    right: -25px;
    box-shadow: 0px 0px 10px rgba(0,0,0,0.2), inset 0px 5px 30px rgba(255,255,255,0.2);
    text-align: center;
    text-transform: uppercase;
    top: 22px;
    background: #d93131;
    width: 100px;
    padding: 3px 10px;
    -webkit-transform: rotate(45deg);
    -moz-transform: rotate(45deg);
    -o-transform: rotate(45deg);
    -ms-transform: rotate(45deg);
} 

.side-corner-tag p:before {
    content: "";
    width: 0;
    height: 0;
    position: absolute;
    top: -17px;
    right: 69px;
    z-index: -1;
    border: 17px solid;
    border-color: transparent transparent #662121 transparent;
}
 
.side-corner-tag p:after {
    content: "";
    width: 0;
    height: 0;
    position: absolute;
    top: 74px;
    z-index: -1;
    right: -10px;
    border: 17px solid;
    border-color: #662121 transparent transparent transparent;
}