I put on a new cobra sidewinder radiant sight today, but when I look through it with my old peep sight I can't see the orange ring around the sight or the bubble level. Just seem a little small all of the sudden..

I was curious what size peep everyone else used. I mean, maybe it's not a bad thing I can't see it all but I would think with a bigger peep I would have a larger FOV..
Or does a smaller peep help keep your groups tight?

Any info is appreciated