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.
MuscleWeave 200G (353g 8.5 HL), Cyberflash 1.25/multi 1.35, @48/53, dropweight stringer