For a great number of years of years I've used a 3 1/4" tee, but early this last summer for whatever reason I switched to a 2 3/4" tee. Wow, what a difference. With the 3 1/4 I was hitting the ball of the top of the driver and really didn't notice. Someone pointed out me what I was doing and a little later I switched to the 2 3/4". What a difference, now more often than not I can square the ball up of the face of the driver.