The Tondo Deluxe Studs have a Swarovski Crystal in the center, with a border of tiny crystals surrounding it.
0.51" diameter. 13mm.
These earrings are NOT interchangeable, but matching Qudo interchangeable tops are available to wear on rings, bracelets, necklaces, or dangle earrings.
For answers to frequently asked questions, such as stone sizes, ring sizing, care, & warranty, copy & paste this link into your address bar: http://the-english-garden.com/store/content/20023/Qudo-FAQ%27s/