6 SIZES: Package included 6 sizes earrings setting 3/4/5/6/8/10mm diamater, widely applicable earring for most stud earrings/post earrings,whatever the normal ears or sagging earlobes/droopy ears. PRECIOUS MATERAIL: Stainless Steel, durable and anti-oxidation, good for your long use, good for health. Good for everybody, best choice for those who have sensitive ears. MATCH EVERYTHING:Whatever the outfit or jewelry you wear,no matter the metal you pair them with,sterling golden earring will still look amazing. You could choose the cabochons you like and glue it on to the round. USAGE SCENARIOS:Replace the lost backings,avoid losing your precious ear rings. Replace existing metal earring backs if your have a metal allergy/sensitive skin. EARRINGS: Easy to put on and off. Light weight and comfortable to wear. Also ideal for fashion jewerly earring designers and DIY earring makers. The earriing backs could use not only this earring, but also use on your own earring as a replacement.