Simplicity can definitely be found on the very first page of the CMD style dictionary. So these new stria studs are certainly part of that simplicity equation. Picture just a sliver of a line laying across your ear -- a slight ridge of sparkling gold or silver. That's really sometimes all you need to feel like a million bucks. These stria studs are 3/8" in length and can be rotated to be worn on any plane you desire. Material: sterling silver. Each pair comes with a pair of matching backs. All materials are hypo allergenic. These stud earrings are handmade in San Francisco, California.