the Blue China Guinness Birthday Cake CakeCentral.com. Description: All earrings are backed with stainless steel hypoallergenic posts secured with resin. Each piece is hand mixed, conditioned, cut into the desired shapes, sanded, drilled, and assembled. and carefully and lovingly packaged by me. Care: Earrings are made with polymer clay and some with brass components depending on the design. While polymer clay is pretty durable, it is not indestructible. Each piece was handcrafted and should be treated with care to ensure their longevity and not bent. Length: Approx. 2. 5 inches Production Time: 3 7 Business Days Payment methods accepted: Credit, Debit, PayPal, Google Pay.