This keychains is a great gift for your mom or grandma that is personalized by the birthstones added to the keychain. The tree piece is about 1 1/2 inches across. 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.  Also if you'd like a mom heart charm, or a grandma heart charm, or a family tag charm added the keychain be sure to mention that in the notes as well.