Fancy art deco period cufflinks with Baltic amber stones in natural shape Size: ±25 x 25 mm please see photos as the part of the description TESTS to indicate natural amber: Floats in the salt water, sinks in fresh water; Acetone resistant; Has characteristics of pine resin odor if heated; Has a characteristic color under UV rays. Shipping: safely packed, courier mail with tracked ID. Usual time of delivery: 2-7 business days.