The Overlap "Vardon" Grip

This grip is the most common grip used by players with bigger hands as it allows them to have the most amount of control over the club.  

The pointer finger of the left hand is completely on the club and the pinky finger of the right hand is completely off the club and resting in between the gap of the pointer finger and middle finger of the left hand. The rest of the fingers are on the club like the other grips. (Demonstrated Below)

Note: All 3 of the middle knuckles on the right hand are in a diagonal line with the pointer finger's middle knuckle of the left hand. (Demonstrated by the Red line above)