These are so gorgeous and very rare! They are available in a size 4,5, or 6 and varying stones which include: Emerald, Sapphire, Ruby, Pearl, Jade, Tigers Eye, and Sodalite (blue). The front measures about 15mm tall. These can't be custom made unfortunately as they are vintage. I left the tags on in some of the photos so you can see that they are genuine vintage gemstone rings.