I've been using 4 1/2 and building it up with two overgrips. Recently I got a 4 5/8 and now I don't have the option of using an overgrip. So I got a replacement grip that's comfortable and now I won't need to keep stocking up on OGs. I'll just change the replacement grip when the time comes.
Dunlop MuscleWeave 200G 95, Lendl pattern was a bust - poor tension stability, Cyberflash 1.25/Hexy Fiber 17 @48/53, Alpha Pioneer DC+ dropweight