.ext {
    background-repeat: no-repeat;
    display: inline;
    width: 10px;
    height: 58px;
    /* margin: -15px 5px; */
    box-sizing: border-box;
    /* float: left; */
    background-size: 100% 100%;
    display: inline-block;
    vertical-align: top;
}
.ext-mini {width: 53px;height: 67px;}
.ext-micro {
}
.ext-nano {
}

.ext.ext-micro {
    width: 30px;
    height: 38px;
}