Power_Player, I saw that you had a question about reducing grip size on another thread that was pretty long. I tried the Laserfibre twintone replacement grips and they probably will reduce your grip size by about 1/8. Putting the replacement grip on is just like putting on an overgrip, you just have to be a little more methodical since the replacement grip has glue.
I use a 4-1/4 grip on my grips. I definitely prefer the smaller grip size.