I just checked my Grip and Ive got 4 putters, 6 mids, and 10 drivers in there. Two putters and a driver up top, 2 putters, 6 mids and 9 drivers in the bottom. Probably got room for one more mid/driver in the bottom but it would be tight.
Edit: If I dropped the putter quiver down, I could fit another 2 putters in the putter pocket, but not very easy access as the other putters would be on top of them.
PPD | Escape x 2 | Saint x 3 | Firebird x 2 | Eagle X x 2, L x 1 | River | M3 | Fugitive | Suspect x 2 | Zone | Pure Opto | Judge Classic x 2