[18K Gold Plated Ear Stud with Loop]: Ear stud with loop made of 18k gold plated brass, bright color and lightweight, not easy to rust or fade, convenient to carry and store.[1 Box 30Pcs Earring Posts]: Package including 30pcs rectangle earring posts with hole, 30pcs open jump rings and 100pcs plastic ear nuts. All storage in a small plastic box: 2.67x2.04x0.43 in(6.8x5.2x1.1cm).[Earring Studs Size]: Rectangle earring studs: 0.49x0.06 in(12.5x1.5mm), hole: 0.03 in(0.8mm), pin: 0.02 in(0.7mm); jump rings: 0.17x0.02 in(4.5x0.7mm), inner diameter: 0.12 in(3.1mm); ear nuts: 0.16x0.16 in(4x4mm), hole: 0.04 in(1mm).[Ideal for DIY]: Earring studs designed with rectangle shape and hole, can DIY earring studs with loop hole, change them into dangle charm earrings, tassel earrings, chain earrings, drop earrings or triple drop earrings.[Wide Application]: Earring studs can be used to make some handicrafts as presents to family members and friends on Valentine's day, Halloween, Christmas, New Year or birthdays. suitable for daily use, parties and activities, can also be used as a match for weddings, decorations, and artworks.