14k gold filled. These hammered wrap rings are adjustable and can be hand stamped with your choice of small design on the outside, with your choice of small phrase on the inside (ex: butterfly, still becoming... bee, be kind) The message inside is hidden and meant for only the wearer. Customization should be entered in the notes at checkout! (Ex: butterfly symbol, cross symbol, heart) If there are any questions about your customization choice, we will reach out through email.