Erect Girth also varies for different factors. To measure your erect girth length you have to use measuring tape or piece of sting (then put it on the ruler). The measurement of erect girth length is different for various people because different people measure girth from different positions. We recommend you to measure your erect girth from the center of penis shaft. This will give you correct measurement.
Now, you hold firmly the penis head, another hand keeps the remaining hand to make a grip. You can sit on the chair or stand up, it depends on you. Then, you get a firm grip on the head, hold straight, and hold for 30 second. You can pull the penis and stretch it, but you can feel painful when you perform this exercise. You can take a short break between the sets, and you can speed up the process or increase the intensity if you feel better.