This keychains is a great gift for your mom or grandma that is personalized by the birthstones added to the keychain. The heart tag is also custom engraved with what you'd like on it. From the drop down menu select the number of birthstone you'd like attached to the keychain. Then add the listing to your cart. Once you've added the item to your cart there will be a box to leave a note on your order. Let me know in the notes what months you'd like attached, and what you'd like engraved on the heart charm. The tree piece is about 1 1/2 inches across.