I let him know that you can use practically any regular beanie pattern to make a kufi. Just end the hat at about 6 inches (some people prefer 5 or 5 1/2 inches) and finish with single crochet to stabilize the bottom edge.
The same goes for the popular docker hat or fisherman beanie (the ear-baring Jacques Cousteau-style hat). To create one, you could make a regular beanie (about 8 or 8 1/2 inches from the center) and turn up the brim about 2 inches. Voilà! A sea-worthy cap!
I let my customer know that I appreciated his questions about kufis (he ended up buying a regular beanie pattern and making his kufi from it), and that I would share the kufi info on my blog.
Just doing my bit in getting the kufi love out there! Such a flattering style of hat!