Material: high quality titanium steel casting, no fading Size: The ring is about 7 mm wide Features: no deformation, wear resistance 5 yards - inner diameter 1.6cm - suitable for 4.7 cm finger circumference 6 yards - inner diameter 1.6cm - suitable for 5 cm finger circumference 7 yards - inner diameter 1.7cm - suitable for 5.3 cm finger circumference 8 yards - inner diameter 1.8cm - suitable for 5.7 cm finger circumference 9 yards - inner diameter 1.9cm - suitable for 6 cm finger circumference 10 yards - 2cm inside diameter - suitable for 6.3 cm finger circumference 11 yards - inner diameter 2.1cm - suitable for 6.6 cm finger circumference 12 yards - inner diameter 2.2cm - suitable for 6.9 cm finger circumference 13 yards - inner diameter 2.3cm - suitable for 7.2 meters of finger circumference