How to make Stylish Labels with Latest 2012

apply this hack manually by adding below CSS code just above/before ]]></b:skin> tag in your template,

.label-size {

    float: left;

    margin: 0 0 7px 20px;

    position: relative;

    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;

    font-size: 0.75em;

    font-weight: bold;

    text-decoration: none;

    color: #996633;

    text-shadow: 0px 1px 0px rgba(255,255,255,.4);

    padding: 0.417em 0.417em 0.417em 0.917em;

    border-top: 1px solid #d99d38;

    border-right: 1px solid #d99d38;

    border-bottom: 1px solid #d99d38;

    -webkit-border-radius: 0 0.25em 0.25em 0;

    -moz-border-radius: 0 0.25em 0.25em 0;

    border-radius: 0 0.25em 0.25em 0;

    background-image: -webkit-linear-gradient(top, rgb(254, 218, 113), rgb(254, 186, 71));

    background-image: -moz-linear-gradient(top, rgb(254, 218, 113), rgb(254, 186, 71));

    background-image: -o-linear-gradient(top, rgb(254, 218, 113), rgb(254, 186, 71));

    background-image: -ms-linear-gradient(top, rgb(254, 218, 113), rgb(254, 186, 71));

    background-image: linear-gradient(top, rgb(254, 218, 113), rgb(254, 186, 71));

    filter: progid:DXImageTransform.Microsoft.gradient(GradientType=0,StartColorStr='#feda71', EndColorStr='#feba47');

    -webkit-box-shadow: inset 0 1px 0 #faeaba,

        0 1px 1px rgba(0,0,0,.1);

    -moz-box-shadow: inset 0 1px 0 #faeaba,

        0 1px 1px rgba(0,0,0,.1);

    box-shadow: inset 0 1px 0 #faeaba,

        0 1px 1px rgba(0,0,0,.1);

    z-index: 1;

}

.label-size:before {

    content: '';

    width: 1.30em;

    height: 1.39em;

    background-image: -webkit-linear-gradient(left top, rgb(254, 218, 113), rgb(254, 186, 71));

    background-image: -moz-linear-gradient(left top, rgb(254, 218, 113), rgb(254, 186, 71));

    background-image: -o-linear-gradient(left top, rgb(254, 218, 113), rgb(254, 186, 71));

    background-image: -ms-linear-gradient(left top, rgb(254, 218, 113), rgb(254, 186, 71));

    background-image: linear-gradient(left top, rgb(254, 218, 113), rgb(254, 186, 71));

    filter: progid:DXImageTransform.Microsoft.gradient(GradientType=1,StartColorStr='#feda71', EndColorStr='#feba47');

    position: absolute;

    left: -0.69em;

    top: .2em;

    -webkit-transform: rotate(45deg);

    -moz-transform: rotate(45deg);

    -o-transform: rotate(45deg);

    transform: rotate(45deg);

    border-left: 1px solid #d99d38;

    border-bottom: 1px solid #d99d38;

    -webkit-border-radius: 0 0 0 0.25em;

    -moz-border-radius: 0 0 0 0.25em;

    border-radius: 0 0 0 0.25em;

    z-index: 1;

}

.label-size:after {

    content: '';

    width: 0.5em;

    height: 0.5em;

    background: #fff;

    -webkit-border-radius: 4.167em;

    -moz-border-radius: 4.167em;

    border-radius: 4.167em;

    border: 1px solid #d99d38;

    -webkit-box-shadow: 0 1px 0 #faeaba;

    -moz-box-shadow: 0 1px 0 #faeaba;

    box-shadow: 0 1px 0 #faeaba;

    position: absolute;

    top: 0.667em;

    left: -0.083em;

    z-index: 9999;

}

#Label1 {

    height: 210px;

}

.label-size:hover {

    background-image: -webkit-linear-gradient(top, rgb(254, 225, 141), rgb(254, 200, 108));

    background-image: -moz-linear-gradient(top, rgb(254, 225, 141), rgb(254, 200, 108));

    background-image: -o-linear-gradient(top, rgb(254, 225, 141), rgb(254, 200, 108));

    background-image: -ms-linear-gradient(top, rgb(254, 225, 141), rgb(254, 200, 108));

    background-image: linear-gradient(top, rgb(254, 225, 141), rgb(254, 200, 108));

    filter: progid:DXImageTransform.Microsoft.gradient(GradientType=0,StartColorStr='#fee18d', EndColorStr='#fec86c');

    border-color: #e1b160;

}

.label-size:hover:before {

    background-image: -webkit-linear-gradient(left top, rgb(254, 225, 141), rgb(254, 200, 108));

    background-image: -moz-linear-gradient(left top, rgb(254, 225, 141), rgb(254, 200, 108));

    background-image: -o-linear-gradient(left top, rgb(254, 225, 141), rgb(254, 200, 108));

    background-image: -ms-linear-gradient(left top, rgb(254, 225, 141), rgb(254, 200, 108));

    background-image: linear-gradient(left top, rgb(254, 225, 141), rgb(254, 200, 108));

    filter: progid:DXImageTransform.Microsoft.gradient(GradientType=1,StartColorStr='#fee18d', EndColorStr='#fec86c');

    border-color: #e1b160;

}