Hello,aljlee,thanks for supporting us.The diameter is about 2 CM.We provide free shipping (HongKong Post & China Post) worldwide.It will take about 20-30 days for the product to reach you after shippment. If you choose faster shipping method (e.g. Fedex, UPS, etc.), you will need to pay extra shipping fee, but the shipping time will be much shorter. Delivery details (method, cost, delivery time) will be shown in order page, before payment.But for the category of "Accessory Package", you will need to purchase over 50USD. If you want to buy it on its own, you will need to pay more.