Style Notes These ingenious and original butterfly back star drops are such fun! They can be attached to the back of any stud or earring to add a little extra dangle and sparkle. Wear mismatched with just a single drop or turn a pair of day time studs into evening drops. Sold individually not as a pair so you can add to the back of any single stud earring. A perfect addition to any Harry Rocks stud! Care & Info Avoid getting wet. Sizing Drop from butterfly to star 3cm.