Ring sizes:
Size 6 - inner diameter 1.6cm - suitable for a finger circumference of 5 centimeters.
Size 7 - inner diameter 1.7cm - suitable for a finger circumference of 5.3 centimeters.
Size 8 - inner diameter 1.8cm - suitable for a finger circumference of 5.7 centimeters.
Size 9 - inner diameter 1.9cm - suitable for a finger circumference of 6 centimeters.
Size 10 - inner diameter 2cm - suitable for a finger circumference of 6.3 centimeters.
Size 11 - inner diameter 2.1cm - suitable for a finger circumference of 6.6 centimeters.
Size 12 - inner diameter 2.2cm - suitable for a finger circumference of 6.9 centimeters.