The width of the rudder tip at the junction with the 'T' foil is 100mm. 30mm above this the width is 120mm and 60mm up from the 'T' foil the width is 140mm. The main width of the rudder is 190mm. I hope this info is of assistance but don't forget my rudders are set up so that approx 20% of the area is in front of the pintel fulcrum point. Thus the loads on the tiller are very light, it feels like an 'A' without the super (stupid) sensitivity.