You dont really need to peel it i do if its not organic. 2 inch size cut will do you.

Ginger has many benefits as you prob know already.

http://www.amlaberry.co.uk

I've found taste wise, it makes a big difference when I peel it, like it removes bitterness or something. Tip of the day- peel ginger with a spoon, seriously. Works way better than a knife and is pretty easy, and only takes the skin away.