I have been demoing a lot of racquets lately and my "measured" grip size is a 4 1/2". But when I play with 4 3/8, it doesn't feel much different. With a 4 1/2 there is room for slightly less than the width of my index finger. With 1 overwrap it is near perfect. The 4 3/8 grips give me about 1/2 a finger's width in between. So how do you tell when a grip "feels right"? The 4 1/2 and 4 3/8 "feel" the same to me when I play. I don't really notice a difference. Should I just stay with the textbook size for me or use a little smaller for more wrist action?