When your dick starts getting bigger, you'll feel it. You may notice it looks just a little different in the mirror. But is it real, or just your imagination? There's only one way to know: measure before you start PE.
Measure erect length: standing or lying down, hold erection straight out from your body. Press ruler against your pubic bone. Measure to the tip of the penis.
'Dead stretch': measure erect length without erection...hold penis behind the head and pull straight out and measure. Learn how to make this measurement match your erect length.
Measure erect Girth: with a piece of string or cloth measuring tape, measure the circumference of your erect penis at mid-shaft. If you don't have a tape measure, use a piece of string and then measure it with a ruler.
Measure visually: compare your flaccid penis in the mirror with some object that will be around a few months from now - a toilet paper tube or deodorant container. A visual comparison is powerful. You'll know for sure it's not in your head!