Backgound Size Css

**** HTML:

<div class="thumbnail product-item wow animated zoomIn animated" style="visibility: visible; animation-name: zoomIn;">

    <a href=''><img src="image.jpg"></a>

</div>

**** CSS:

.thumbnail{

    margin-bottom: 25px !important; 

    /*background: url(../images/TDSG.png);*/

    background-repeat: no-repeat;

    background-size: 267px 314px;

    border: none !important;

    border-radius: none;

    overflow: hidden;

}