1.Hand Stamped 2.Material-Stainless Steel:don't tarnish, don't rust, and don't change color.It is lead free and nickel free. 3.Measurement:4*2.5cm. 4.High-quality and durable,the penguin a gadget is cute and colorful,making it the perfect accessory for friends and family who love penguins. 5.It comes with a velvet pouch,ready for gifting. Keychain