.img_size {
    min-width: 160px;
    min-height: 160px;
    max-height: 160px;
}

.add_image {
    height: 18px;
    width: 24px !important;
    background: url(../images/add_img.png) no-repeat bottom;
    position: absolute;
    bottom: 5px;
    right: 5px;
    z-index: 1;
}

    .add_image:hover {
        background: url(../images/add_img.png) no-repeat top;
    }

.edit_image {
    height: 18px;
    width: 24px !important;
    background: url(../images/edit_img.png) no-repeat bottom;
    position: absolute;
    bottom: 5px;
    right: 5px;
    z-index: 1;
}

    .edit_image:hover {
        background: url(../images/edit_img.png) no-repeat top;
    }

.delete_image {
    height: 18px;
    width: 24px !important;
    background: url(../images/delete_img.png) no-repeat bottom;
    position: absolute;
    bottom: 5px;
    right: 28px;
    z-index: 1;
}

    .delete_image:hover {
        background: url(../images/delete_img.png) no-repeat top;
    }

.zoom_image {
    height: 18px;
    width: 24px !important;
    background: url(../images/zoom_img.png) no-repeat bottom;
    position: absolute;
    bottom: 5px;
    right: 5px;
    z-index: 1;
}

    .zoom_image:hover {
        background: url(../images/zoom_img.png) no-repeat top;
    }