What size hole saw should I use for notching Sch40 Pipe?

Pipe Size Outside Diameter Recommended Hole Saw
3/4" Pipe 1.05" 1-1/16" (1.062")
1" Pipe 1.315" 1-5/16"  (1.312")
1-1/4" Pipe 1.66 " 1-5/8"  (1.625")
1-1/2" Pipe 1.90" 1-7/8"  (1.875")
2" Pipe 2.375" 2-3/8"   (2.375")

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