figure.myAttachThumbnail img.wp-post-image {
    width: 100%;
    border-radius: 20px;
    display: block;
    object-fit: cover;
    height: 330px;
}
figure.myAttachThumbnail {
    position: relative;
}
figure.myAttachThumbnail figcaption {
    background: #1f2526;
    color: #FFF;
    position: absolute;
    bottom: 10px;
    right: 10px;
    padding: 10px 16px;
    font-size: 9pt;
}