Birth Month Flower Earrings| September Aster | Hypoallergenic Handmade Earrings | Dangle Earrings | Clip-ons Available Gift these unique birth month flowers to your family or friends! Characteristics - Handmade with polymer clay - 1.5" in length - Post backs - Hypoallergenic: All Clay Avenue Jewelry earring posts and hooks are made with either gold- or silver-plated surgical grade stainless steel.