Answer: Looking great dude!
I'm about to turn 17 and wish I started as young.
There really isn't a way to scale yourself other than literally measuring the braudness of you chest, arms, and waist. Or before and after images.
If you want to be bigger I'd recomend bulking and creatine. Basically it swells your musciles with water. Lactic acid is mostly water, and is also what goes towards your growth when you tear musciles.
Keep it up man, and good luck.
Step-by-step explanation: