Initial impact: Our Tunic-T Ring is capped off at either end with a graphic take on the letter — inspired by the shape of our signature clothing design. Made of brass, with colorful enamel, this understated open style slips on with ease and looks great with everyday outfits. Brass. Opening:. 20" (0.5 cm). Width at widest point: 0.48" (1.2 cm). Width at thinnest point: 0.18" (0.5 cm).