2 mm diamond - white gold - two flat back posts: 5 mm and 6.5 mm included Personally owned for my tragus piercing. I only used the 6.5 mm backing before I switched for another jewelry style. Purchased at Mariah Tash in NYC, Jan 2025 See photos for details Website description: An elegant brilliant round diamond is invisibly set in solid gold using our patented method, without prongs or bezels covering the top of the stone. A classic addition to any Curated Ear®. Includes a ball flower threaded backing in a matching color. Item sold singly. More Information 18k solid gold frontal, 14k solid gold post, nickel free and hypoallergenic 0.03ct VS2/G Hearts and Arrows Cut Diamond