In general the design tends towards a 12-14 inch blade with a 6-7.5 inch handle length, around 1.5 inches broad and .23 to .17 spine thickness. There's a gentle distal taper that increases near the tip. Full convex grinds and while I forge out some on the tip and bevels, I try to leave the stock bar thickness on the tang to help with the balance. Handles thus far have varied from ipe, micarta, argentine lignum vitae, jatoba, and figured maple.
For steels on these i've been mostly going with 8670M or 5160. Both hold up very well. I'm fond of the lanyard tubing pins all the way on them as a forward lanyard can be a real shin and leg saver when chopping. But i've done some pretty multi pin patterns, too.
While certainly more simple than a lot of fighters, they are very servicable field knives and I'm liking the balance and utility of the basic spanish dirk design influence a lot.