Question: how big is 1/2 carat diamond earring?
Answer: This would be described as diamond studs or diamond earrings weighing 1.00 carats total weight. Which would be abbreviated as 1.00 cts. t.w., and consist of two diamonds weighing a half carat each. The average outside diameter of a half carat diamond is going to be right around 5.0 millimeters.