These are Vintage Air Blue Opal 8mm Square rhinestone earrings. To get an idea of the size refer to the ear pic above. Posts…solid hypo-allergenic surgical steel. Backs…comfort grip hypo-allergenic rubber. Large earrings have a large comfort grip rubber back to support them properly on the ear without sagging. 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. 8mm Air Blue Opal Square Rhinestone Stud Earrings, Crystal Vintage Earrings