Specifications: Maximum 23.8mmX15.8mm. Minimum 28.2mmX7.3mm. Weight 17.77g. Irregular shape, pure natural, lightly polished. We can package and ship this item to US address via USPS Priority Mail or FedEx Ground / UPS for $23.95. Tracking information will be sent to your email address. This price does not include insurance. If you need insurance, please contact us for additional insurance. International buyers please contact us for international shipping.