Hey @
maton ! I only have a full Roman's Obi-Wan Mk1 FX, but it measures out at 10-31/32".
The REAL Armitage Shanks Sink Knob is 1-49/128" Tall, and 1-123/128" in Diameter at its widest (across the face of two of its opposite cubes).
I hope this answer you questions a bit!