.dropzone .dz-preview .dz-image img {
    margin: auto; /* center the image inside the thumbnail */
}

.dropzone .dz-preview .dz-error-message {
    top: 140px; /* move the tooltip below the "Remove" link */
}

    .dropzone .dz-preview .dz-error-message:after {
        left: 30px; /* move the tooltip's arrow to the left of the "Remove" link */
        top: -18px;
        border-bottom-width: 18px;
    }

.dropzone .dz-preview .dz-remove {
    margin-top: 4px;
    font-size: 11px;
    text-transform: uppercase;
}

img.thumbnail {
    max-width: 120px;
    max-height: 120px;
    width: auto;
    height: auto;
}