full-width: yes/no (optional). Default is narrow width
background-color: hex or rgb value (optional)
position-image-right: yes/no (optional). Default is left
image: image (optional). Aspect ratio 1:1, e.g. 1000px x 1000px
image-small: alternative image for mobile (optional). Same aspect ratio as the larger image, but adds a more optimised mobile image if required, e.g. 600px x 600px
quote-icon-color: hex or rgb value (optional)
title-size: s, m, l (optional). Default is l
title-color: hex or rgb value (optional)
review-link-url: url
review-link-color: hex or rgb value (optional)
author-size: xs, s, m, l, xl, xxl (optional). Default is m