This is an instructable on how to play the Drum Set
Step 1: Pick your size drum stick
Also, figure out how heavy you like them. If your favorite size is 5a, find 5a sticks that are your liking of weight. It makes a large difference
Signature sticks only come in one size, so if you want those awesome Joey Jordison Signature sticks, and you don't like the size, then don't buy them, or buy them and showcase them.
Sticks make a huge difference. If it is too thick, you are not capable of doing what you can do with the size you are comfortable with. Sticks that are too thin can make you feel like you are hitting nothing but air, and it is weird.