Ring Height

If your Objective (the bell itself, not the glass) Outside Diameter Measurement is this size For 1 inch tubes you will generally need rings at least this high from the top of the base to the bottom of the scope tube For 30mm tubes you will generally need rings at least this high from the top of the base to the bottom of the scope tube
25mm, .984 inches .150 inches  
26mm, 1.023 inches .150 inches  
27mm, 1.062 inches .150 inches  
28mm, 1.102 inches .150 inches  
29mm, 1.141 inches .150 inches  
30mm, 1.181 inches .150 inches  
31mm, 1.122 inches .150 inches  
32mm, 1.259 inches .150 inches  
33mm, 1.299 inches .150 inches  
34mm, 1.338 inches .150 inches  
35mm, 1.377 inches .150 inches  
36mm, 1.417 inches .270 inches  
37mm, 1.456 inches .270 inches  
38mm, 1.496 inches .270 inches  
39mm, 1.535 inches .270 inches  
40mm, 1.574 inches .270 inches  
41mm, 1.614 inches .270 inches  
42mm, 1.653 inches .270 inches  
43mm, 1.692 inches .270 inches  
44mm, 1.732 inches .270 inches  
45mm, 1.771 inches .270 inches  
46mm, 1.811 inches .270 inches  
47mm, 1.850 inches .270 inches  
48mm, 1.889 inches .270 inches  
49mm, 1.929 inches .270 inches  
50mm, 1.968 inches .270 inches .300 inches
51mm, 2.000 inches .270 inches .300 inches
52mm, 2.047 inches .270 inches .300 inches
53mm, 2.086 inches .270 inches .300 inches
54mm, 2.125 inches .270 inches .300 inches
55mm, 2.165 inches .270 inches .300 inches
56mm, 2.204 inches .390 inches .300 inches
57mm, 2.244 inches .390 inches .300 inches
58mm, 2.283 inches .390 inches .300 inches
59mm, 2.322 inches .390 inches .300 inches
60mm, 2.362 inches .390 inches .300 inches
61mm, 2.401 inches .390 inches .410 inches
62mm, 2.440 inches .390 inches .410 inches
63mm, 2.480 inches .390 inches .410 inches
64mm, 2.519 inches .500 inches .410 inches
65mm, 2.559 inches .500 inches .410 inches