Earring Sizes (each stud): 12mm = .47in (most popular size). 10mm = .39in. 8mm = .31in (Note We do not recommend 8mm earrings for designs that have a lot of writing and/or detail since these are tiny images) The setting refers to the metal part of the earring. If a setting color is not selected, we will choose whatever looks best. Nickel Lead-free zinc alloy, perfect for sensitive ears! Handmade in Texas! ALL items are made to order.