PREMIUM MATERIAL AND CRAFT:Crafted with titanium steel material,hypo-allergenic,rust resistance, with retro style electroplating process and finish, no deformation,maintain a nice texture for longer time.Overall length is about 4 cm, diameter is about 6mm. 1 pair hoop earrings for all, unisex hoop earrings. EASY TO WEAR & NON-SLIP:Easy to wear on,just wear the earring at proper place on earlobe . Once fix, the earring can stay in place well. Also convenient to take it off.