You don't need to measure and try to validate your growth through photos. Even if I did that personally, it's not needed. But it's a good way to track progress.
Just make sure you measure from your Pubis, and that you are measuring the same way every time.
Measurement is a tool to see if your programming is working.
Also it's always harder to get an accurate measurement in front of a camera.
If you have a curvature to your penis especially upward curvature, it's even harder to get a accurate measurement, because the act of straighten your penis for measurement will reduce your erection level.
But if you have this research in back of your mind it will not matter:
The Mechanics of Deep Penetration
Thanks for the reminder Red. I wanted to wash this and I completely forgot about it, thank you
mattersofsize.com
As long as you are growing you should be proud of yourself.