The part that goes into the piercing hole is the same as a regular earring. It's easy to put in, and it closes securely, making it difficult to fall out, so you don't have to worry about losing it. Since there's no back, it's less likely to hurt when you sleep. The simple design is timeless and versatile, making it a valuable addition to any style. 《Color》 Black 《Size》 Ring (inner diameter): 12mm Thickness: 2.5mm 《Contents》 Set of 2 (for both ears) 《Material》 Surgical stainless steel 《Please Read》 To ensure prompt shipping, we may omit greetings after purchase. We will greet you when we send the shipping notification, so please rest assured. The product will be sent in a simple package directly in an envelope. Please note that we do not use bubble wrap or cushioning materials. We also have precautions listed in our profile. Please be sure to check them before making a purchase.