Material: keychain is made of stainless steel, it is known for its hypoallergenic qualities, making it suitable for delicate skin.The pendant, charm and the chain all made with stainless steel, does not rust, It is an amazing metal for jewelry that will last forever- just like the memory it represents. Size: The size of the keychain is 1.2cm(0.47inch) * 5 cm(1.97inch), which is suitable for wearing keys. TIPS: manual measuring permissible error. Engraved words ”From Little Acorns Mighty Oaks Grow” We love the thought behind this present and the engraved words make it a really lovely present. Thank you teacher/nurse gift- Lovely way to express gratitude and appreciation to a special teacher/nurse who guards your healthy growth.Themed gifts magnify our thoughtful gesture and make the recipient feel extra special. This keychain will come to you nicely presented in the Zuo Bao jewelry velvet bag,which is strictly protected from any damage during transportation. Every product designed by Zuo Bao has a certain meaning.