Sterling Silver 4mm Ball Stud, Small Hoop and Cubic-Zirconia Stud Earrings, Set of 3 Hoop has a click-top, it .6" in length, 1.1mm in width and .5" in diameter, Sterling Silver Ball Stud has a post and friction back, it is .1" in length and .1" in width, Cubic Zirconia Stud has a post and friction back and is .1" in length and .1" in width Made in Thailand Imported