SIZE: 3cm long Hypoallergenic, Nickel Free, Hand Made Resin, Surgical Steel Posts Made with sustainable resin, which we source from leftover product of glass frame makers. We then recycle it to create our vibrant patterns. All posts are hypoallergenic made from surgical steel. Keep jewellery dry. Be careful with fragrances; apply lotions and potions before jewellery. Limit exposure to direct sunlight. Store jewellery in cool, dry place.