How is a grip measured?
The grip on a tennis racket is measured based on the circumference of the grip, if you were to get a tape measure and wrapped it around the handle, that’s how you would measure the size of the grip. The typically common sizes are 4 1/4, 4 3/8, 4 1/2, 4 5/8 those are the handle size on the racket, anything else that is bigger than that would be custom or very large.