Its hip to be square. These hoop earrings feature a diamond-cut, open square crafted from 14K yellow gold that's gone through a patented hardening process. They are more durable and resistant to denting, scratching and breaking, and will also maintain their consistency in color, shine and vibrancy for many years. Hypoallergenic and nickel free. Metal: 14K yellow gold Back: Hinged Dimensions: 23.4x26.73mm long; 2.73mm thick Jewelry photos are enlarged to show detail.