Base Ring

0 - (1 ½ inches / 38.1mm) 1 - (1 ⅝ inches / 41.3mm) 2 - (1 ¾ inches / 44.5mm) 3 - (1 ⅞ inches / 47.6mm) 4 - (2 inches / 50.8mm) 5 - (2 ⅛ inches / 54mm) 6 - (2 ¼ inches / 57.20mm) 7 - (2 ⅜ inches / 60.30mm)

Standard Curve XD