3mm 0.20 ctw 0.7g Subtle, minimalist, perfect for second holes. Genuine 925 Sterling Silver: Stamped for authenticity. 5mm 1.00 ctw 1.4g Classic stud size with noticeable sparkle. No Plating / No Fill: Unlike cheap brass or "silver-plated" jewelry, these willnot turn your ears green or lose their finish.