[18K GOLD PLATED EARRING STUDS]: Round earring studs are made of real 18K gold plated brass, comfortable and safe to skin, high polish finished, long-lasting, not fade off. [30PCS EARRING POSTS IN A BOX]: Including 30pcs circle earring stud and 30pcs butterfly ear backs, all packed in a small plastic box: 2.91x2.83x0.66inch(7.4x7.2x1.7cm). [SIZE]: Simple stud earrings about 0.47 inch(12mm) long, pin: 0.03 inch(0.7mm) , ear backs about 0.240.160.14 inch643.5mm, hole: 0.04 inch(1mm). [CIRCLE EARRING POSTS]: Twisted round post earrings, allows you to attach dangle charms, beaded charms with jump rings and chain to make new drop earrings. [BEST GIFT]: Minimalist stud earrings can be used as perfect gifts for mom, sister, girlfriend on occasions such as Christmas, birthday, Mother's Day, Valentine's Day, anniversary, dance or graduation ceremony.