Whats the size of GemLightbox? January 22, 2019 02:26 Follow GemLightbox weighs 4.0KG and measures 20cm x 30cm. GemLightbox weighs 8.8lb and measures 7.9in x 11.9in. Related articles What smartphone can I use? What makes GemLightbox different? How to photograph necklaces and pendants Do I still require retouching? Comments 0 comments Please sign in to leave a comment.