Centurian Bo (Thin Line)Staffs. The Centurian Bo is 3/4" diameter at center and tapers to 3/8" at ends. It is light weight and strong. Your choice of size from 48" to 72" long + or - 1/4". All Bo-Staffs are made to order and considered custom. Custom weapons are non-returnable, all products are guaranteed against defects in materials and workmanship.