Glad you asked. It would be difficult to get a accurate measurement of the Diameter of your hard cock without first measuring the circumference. Once you accomplish that you would know the size of the circle you would be using to figure out the diameter....Diameter or circumference?
How to measure girth. Once you've got your length measurement, you may also want to work out your girth (the length around an object). This means you will need to measure the circumference of your penis.
- Use a soft measuring tape for sewing, make sure it doesn't have any stretch. ...
- Gently wrap the measuring tape around the thickest part of the shaft of the erect penis.
- Note where the ends of the tape meet; that's the number you're looking for.