How can I add about 3 inches to my arm size in 3 months?

Hello folks, I am currently trying to add some decent size to my arms. Does anyone out there know what the best way to do this is? I am asking in reference to certain supplements / exercises to do. What frequency to do them, weight to use etc etc. I have heard about fast twitch and slow twitch muscles but... show more Hello folks, I am currently trying to add some decent size to my arms. Does anyone out there know what the best way to do this is? I am asking in reference to certain supplements / exercises to do. What frequency to do them, weight to use etc etc.

I have heard about fast twitch and slow twitch muscles but am not too certain how to train each. All help is appreciated.
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