We get this question every so often so I figured I'd take a pic today. Right pic looks a little funny but you can see the grip end is a fist and a thumb away.
I read somewhere that if you are in a good setup position you should be able to let your hands hang down and just touch the top of your knee cap. This helped me with distance from the ball as well as little more knee bend and bending at the hips. You will find a lot of answers but the key is to find one that keeps you from drifting closer or farther away and being able to cheat the system you are using. So far that system is working for me but who knows in a week or two.
Check out this thread on posture