We need vids of your lifts.

What *exactly* is your diet like?

Are you resting properly?

Do you deadlift?

Whats your upper body training like?

You don't do squats to make your arms bigger specifically. You do squats to get bigger as a whole. Squats are a full body workout when done properly. Suats are one your biggest lifts and putting the big stresses on the body causes the big adaptions (aka growing). Its how our bodies adapt to manage the stresses.

IronWorker