.gmpMarkerInfoWindow {
    width: 290px;
    height: 150px;
    overflow:auto;
}
.gmpInfoWindowtitle {
    font-size: 19px !important;
    font-weight: bold !important;
    color: brown;
    margin: 0 0 5px 6px;
}
.gmp_MapPreview img{
 max-width:inherit;   
}