Reposhing this item I purchased from @ljenner. The jumprings fit 16g/18g, and unfortunately all of my posts are 14g. The only thing I tried to do was fit the jumpring over the post: it was not worn by me. This stunning 14k white gold box chain measures 18 mm from jump ring to jump ring. The rings fit 16g/18g posts ONLY (I tried to fit it over a 14g, hence the resale). I have cleaned it and sanitized it. Similar to: BVLA, Anatometal, Quetzalli, Pupil Hall, Modern Mood, Buddha Jewelry Organics