It is huge. And heavy. But it fits my palm-over style perfectly. It's like the difference between a head light and head heavy tennis racquet, gives more control and positive engagement plus no annoying raised stitching and flat top of the OEM knob. It screws on the stock shaft and locked with a jam nut.
I ordered it from a Toyota dealer but you need a VIN from an '07 TRD FJC and proof of ownership, one of those Toyota system quirks for their special editions.