Per MGP8108 Arms and Equipment, it's a broadsword on a stick.
Comparable to the Japanese nagamaki, which is essentially a katana on a stick.
http://en.wikipedia.org/wiki/Nagamaki
So, expect a 35-40" (89-102cm) blade on a 30-40" (76-102cm) handle. Unlike the Nagamaki, I'd expect a straight blade and thrusting tip.