Materials: BrassBrass rectangle earring post designs for adults and even craft makings can also use for new jewelry or to replace other earring posts. 18K real gold plated brass earring studs are easy and convenient to wear and design. Can match different occasions and apparel. Stainless steel rectangle stud earring posts are lead & cadmium-free also nickel-safe.Dimensions 1.38\ x 0.40\ x 0.04\(35.12mm x 10.14mm x 1.13mm)Hole Size:0.11\(2.72mm)Net Weight:0.06 oz.1.7 grColors : 18K Real Gold Plated Material: Brass Stainless Steel Stud\t*All