Solid titanium triple groove inlay ring blank, 8mm width, with comfort fit radiused interior profile for everyday wear comfort. Custom made 1.5mm deep center channel groove is perfect for adding your own inlay material like crushed opal. Very low profile ~2mm thickness most comfortable for wearing all day. Premium-grade titanium is extremely lightweight and durable. US standard whole and half size ring blanks to create beautiful, handcrafted rings.