I have the 10.5" staff bag that has the 6-way divider and it works perfectly for me.  I usually carry some extra clubs when I'm practicing and still have plenty of space.  You could get the 9.5" staff bag and still be fine.  I hope it helps!

Thanks for the reply, DMac.  Yes, that helps, but was more wondering about the clubs getting tangled together.  Was wondering if the 3-way full length dividers prevented that with the 6-way top setup.

Hey David S, it looks like there's a lot of Davids commenting on this thread!  

The 3-way full length divider is extremely helpful in preventing the clubs from getting tangled together.  I would go with the 9.5" bag since it's a bit easier to fit on a cart than the 10.5".

Hey David, 

I have the 9.5 midsize staff bag and have 17 clubs in it and a set of alignment rods regularly with little issue.  I use standard width grips so if you use larger grips I would assume they could stick more in there.  I have an old school black and white 10.5 staff bag and it is way too big I much prefer the size of the midsize 9.5 bag.  Hope this helps and I love this bag.  

I have the mid sized staff bag, i am not a huge fan, i thought each space would be divided…..my clubs get tangled which really irritates  me

I decided to pull the trigger and bought the Midsize Staff Bag and it just arrived today.  I absolutely LOVE IT!!!!!!  It has SO much more room that the staff stand bag (which I'm keeping for the times I want to walk the course) and the six-way divider top is just perfect.  Thank you, Titleist, once again, for making another perfect piece of equipment!

Great David!!  Glad you love it!!