1. Package IncludesThe package contains 20pcs 14K Gold hypoallergenic stud earring, 20pcs silver hypoallergenic stud earring, 20pcs KC gold butterfly earring back, 20pcs white K butterfly earring back. Sufficient quantity meets your daily earring making needs. You can also share them with your friends and family members. 2. Material and SizeThe stud earrings with loop are made of stainless steel. It is hypoallergenic, lead and nickel, not easy to break, deform or bend, easy to keep their colors and shapes after using for a long time, sturdy and durable. Size: The earring is about 15mm/0.6inch long, round surface width about 6 mm/0.24inch, hole: 1.8mm/0.07inch; Ear Nuts: 5mm/0.2inch. 3. Each earring post has a hole. You can pair it with jump ring, beads, tassels, dangle pendants, trinkets, sparkling gemstones, or other accessories to create your own unique style earrings. The earring back is suitable for spherical earrings and other styles of earrings. 4. Shiny and ElegantThese jewelry making earring studs feature delicate workmanship and are designed simply and stylishly. The glamorous metallic luster can make your daily outfit more elegant, suitable for party, travelling, shopping, dating and other occasions to wear.