.box {
    width: 200px;
    height: 75px;
    position: relative;
    /*border: 1px solid #BBB;*/
    /*background: #EEE;*/
}

.ribbon {
    position: absolute;
    left: -5px;
    top: -5px;
    z-index: 1;
    overflow: hidden;
    width: 75px;
    height: 75px;
    text-align: right;
}

    .ribbon span {
        font-size: 10px;
        font-weight: bold;
        color: #FFF;
        text-transform: uppercase;
        text-align: center;
        line-height: 20px;
        transform: rotate(-45deg);
        -webkit-transform: rotate(-45deg);
        width: 100px;
        display: block;
        background: #79A70A;
        background: linear-gradient(#F79E05 0%, #8F5408 100%);
        box-shadow: 0 3px 10px -5px rgba(0, 0, 0, 1);
        position: absolute;
        top: 19px;
        left: -21px;
    }

        .ribbon span::before {
            content: "";
            position: absolute;
            left: 0px;
            top: 100%;
            z-index: -1;
            border-left: 3px solid #8F5408;
            border-right: 3px solid transparent;
            border-bottom: 3px solid transparent;
            border-top: 3px solid #8F5408;
        }

        .ribbon span::after {
            content: "";
            position: absolute;
            right: 0px;
            top: 100%;
            z-index: -1;
            border-left: 3px solid transparent;
            border-right: 3px solid #8F5408;
            border-bottom: 3px solid transparent;
            border-top: 3px solid #8F5408;
        }