.gallery-thumb {
    position: relative;
    display: inline-block;
}
.gallery-thumb img {
    max-width: 80px;
    max-height: 80px;
    border: 1px solid #ddd;
    padding: 2px;
    border-radius: 4px;
}
.remove-gallery-thumb {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #f00;
    color: #fff;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    text-align: center;
    line-height: 18px;
    font-size: 14px;
    cursor: pointer;
}