These flat back posts are compatible with all the push pins sold here. You will need a set for each piercing you plan to wear flatbacks in. They are lifechanging!! Say goodbye to those pokey butterfly back earrings. Posts essential for your push pin designs. The flat back design ensures comfort and security, while the sleek and simple design adds a subtle kick to any look. ** flat backs may come as flowers, hearts or discs. Note: Posts come in 20g (thinnest, infant size) 18g (most lobes) and 16g (thickest, cartilage) 18g are typically worn in lobes but will fit all cartilage piercings. If you know you were pierced with a 16g needle in your cartilage, purchase the 16g. Post lengths: 6mm (shortest length for healed piercings) 7mm (medium length, maybe some swelling or just thicker lobes are cartilage) 8mm (long length, this is the length I pierce with. Definitely gives some wiggle room if needed but do not recommend on healed piercings to avoid shifting in the piercing.) * Titanium Implant Grade TI-6AL-4V ELI ASTM F136
