age old question: how do i make my biceps bigger?

[Luther Strode]

I lift moderately heavy for high reps 12-15.
When training arms I responded well to high volume + supersetting.
I just recently starting working arms three times a week(1 day=full arm day) however, I'll see how that goes

[Big Dicc Daddy Jones]

If you mean your whole arm. Then do your triceps more then biceps. Triceps make up 2 thirds of your arm and that's what fill up the sleeves

[Big Dicc Daddy Jones]

Also you need to do more cardio, you're supposed to do 30-60 minutes a day

[Big Dicc Daddy Jones]

One last thing, do pull ups and chin ups. let's not forget hammer curls.