Titanium, hypoallergenic, nickel-free, lead-free; best choice for sensitive ears. Length: 7mm, Width: 7mm, Butterfly earring backs, easy to adjust and keep secure. 12mm titanium posts length, with 20 gauge (0.8MM) thickness, convenient to wear. These anti-allergic titanium earrings for women are suitable for both official and casual styles. Suitable for any occasion. In excellent used condition.