2g gsx rotor upgrade

[HiImBrian]

So I've done some looking around on the forums and didn't come up with much good info on the topic so here goes. I need new rotors for my gsx. I am not looking to do a huge big brake upgrade or anything. I'm just looking to do a small upgrade that will prolong the life of the rotors and help the braking some. I have heard that the stockers are pretty decent. I have also heard that getting steel braided lines is much more noticeable than new rotors.

My question is (and this might be noobish and I apologize) do stock calipers fit on larger rotors? I assume this depends on which rotor.

What size are the stock rotors?

I am planing on getting new lines for sure and I'm just deciding on which rotors to get. Thanks!