7.27mm Cobalt Blue Rhinestone Flat Back Earrings. To get an idea of the size refer to the ear pic above. Backs…solid hypo-allergenic surgical steel butterfly backs Earrings come to you carded & in my cotton filled gold embossed gift boxes. From our different pics you can see how the same earring can appear different colors in different lighting conditions & when simply viewed at different angles.. These ever changing color effects are what make crystals such interesting & captivating jewelry pieces. SEE THE REST OF OUR JEWELRY COLLECTION AT Cobalt Blue Flat Back Rhinestone Stud Earrings, 7.27mm Crystal Studs, Surgical Steel Earrings