7mm smokey grey mother-of-pearl vintage button stud earrings on sterling silver or surgical steel posts, with butterfly backs. The buttons are 1mm thick. These are made from real mother-of-pearl / shell, and have a pearly sheen and wonderful complexity. They are true vintage, and as such there are slight variations between different buttons. Your pair of vintage button earrings will be closely matched to each other, which I do for every pair of these that I make – but the size can vary a bit, between 6.5mm and 7.5mm.