The septum tusk is made from water buffalo bone by Oracle Body Jewelry. 'Regular' tusk lengths are listed below. Extra long tusks all measure about 3" long, regardless of the gauge. Available in size 4g Extra Long only.
Regular Tusk Length:
14g-6g is about 1-9/16" long (40mm)
4g is about 1-13/16" long (43mm)
2g is about 2-3/8" long (60mm)