Your piercing with shine from the back with this 14k gold flatback, which will fit with any threadless end. 16g will fit in most cartilage piercings (conch, helix, flat) and lobes pierced with a needle. The length of this post is longer, and will accommodate a thicker cartilage, or a chain attachment. See website below for more details. https://starfirebodyjewelry.com/products/bvla-threadless-gold-flatback-labret-post-straight-barbell-end-with-fixed-disc-standard-line