#bigmart_sidebar_layout label{
    position: relative;
    display: inline-block;
    margin-right: 20px;
    margin-top: 10px;
}

#bigmart_sidebar_layout label input{
    opacity: 0;
    position: absolute;
    left: 0;
    top: 0;
}

#bigmart_sidebar_layout label img{
    vertical-align: middle;
    border: 2px solid #EEE;
    width: 90px;
}

#bigmart_sidebar_layout label input:checked + img{
    border: 2px solid #007CBD;
}