Here are the measurements for my storm jib.  It was made by Mckitrick (sp) and came with the boat.  It has a long luff and short foot.  It is very short in the foot, and long in the luff and the clew is cut high.

Luff:       20 Ft.
Leech:   17 ft 8 inches
Foot:     18 1/2 inches
Reef      37 1/2 inchs above the tack and clew