This is a BIG shift knob, 6cm in diameter (about the girth of a water bottle) and nearly 10cm of height. It taps itself as it threads onto your shift lever and doesn't interfere with the reverse lockout switch.
The top is beveled so it can be comfortably shifted either from the top, or from the sides.
STi logo comes out great.
This won't be for everyone, only those with larger hands.
Added a Spherical shift knob as well.