.image-div {
height: 100%;
padding-top: 100%;
width: 100%;
background-size: cover;
background-position: 50% 25%;
background-color: transparent;
position: relative;
z-index: 1;
display: block;
border: none;
margin: 6px 0;
<div class="image-div" style="background-image:url(Imagem)"></div>