.mwcz-container { position: relative; display: inline-block; }
.mwcz-zoom-window {
    position: absolute;
    top: 0;
    left: 105%;
    width: 300px;
    height: 300px;
    border: 1px solid #ccc;
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    z-index: 20;
    display: block;
}