Medium: 6x4mm overall size, with 3mm gemstone Small: 4.5x3.5mm overall size, with 2mm gemstone Choose from the gemstones we have available or message us to custom order if the item is not in stock. Handcrafted Solid 14k Yellow, Rose and White Gold with stainless steel threadless end compatible with 16g and 18g post/backing. 18k solid threads available for 18g, 16g and 14g threaded posts/backings upon request. Locally made in Downtown Los Angeles. Sold as single, threadless post/backing not included. (We do not make the posts/backings)