Kuroshitsuji Phantom Ring Size: Approximately US size 6 (Japanese size 12) I received this from a friend overseas and am selling one as I have two. I'm not sure of the ring's material, but the stone is zirconia. The size is adjustable, but the ring itself is made of a hard, sturdy material, so it will require some force to adjust. It's made of a durable material that shouldn't easily bend or warp with wear. I will ship it via Nekopos, without the ring box. If you would like the ring case, please comment. I will ship it via Takkyubin Compact for an additional shipping fee. Although it is a new, unused item, please consider it as a pre-owned item as it has been in someone's possession once. Shipping is planned via Nekopos.