jumbo putter grip
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I recently had my putter regriped with a Super Stroke Slim 3.0. I looked at the Jumbo grips, but being that my hands measure 8 1/2" across, the Jumbo size seemed a bit to big. With the 3.0 I have more control over my putter.
I would suggest going to a pro shop and trying different grips to see what you like.
I'll play since the OP didn't get much of a response. I tried a bunch in 2012 and early 2013 before going back to the stock Odyssey grips. I hated the SS Fatso, more about the hassle of extracting it from the bag than anything. I went down to the 1.3 or whatever it is and liked it better but still really wasn't my thing. Love the SS Ultra Slim and tried the tapered Winn Jumbo. In the end there just wasn't any magic in it and I tired of people asking me about it. Wasn't quite as common as it is now then. For sure I liked the bigger grips better on blades and small mallets but felt strange on bigger mallets. I use the Odyssey Sabertooth with the big shaft now so the stock grip is a little bigger. I've come full circle with putters after fittings and different lessons. Had to go back what gave the best results on the green. Which for me is a big, honkin' ugly putter.