Volcano Ring

8 (diam. 1.53cm) 9 (diam. 1.56cm) 10 (diam. 1.60cm) 11 (diam. 1.63cm) 12 (diam. 1.65cm) 13 (diam. 1.68cm) 14 (diam. 1.72cm) 15 (diam. 1.74cm) 16 (diam. 1.78cm) 17 (diam. 1.81cm) 18 (diam. 1.85cm) 19 (diam. 1.88cm) 20 (diam. 1.92cm) 21 (diam. 1.94cm) 22 (diam. 1.98cm) 23 (diam.2.02cm) 24 (diam. 2.05cm)