Penis Outside
(Circumference)

Cylinder Order Size
(Tube Inside Diameter)

3.5 to 4.5" 

1.5" 

4.75 TO 5.25"

1.75"

5.5 to 6.0"

2.0"

6.25 to 6.75"

2.25"

7 to 7.5"

2.5"

7.75 to 8.25"

2.75

8.5 to 9"

3"

10.25"

3.25"

11.75"

3.75"

13"

4"

14.25"

4.5

15.75"

5"