Here is that big Dao you've been looking for. The Dao... on the right.
The length from tip to guard is 36.5". From guard to end of pommel is 13".
The weight (without scabbard) is 4.07lb (1.85 Kg)
Thickness of blade at guard nearly 7/32"
Thickness of blade near tip just over 1/16"
Width of blade at guard 2 1/32"
Point of balance from guard is 9.25"
Includes wooden scabbard (1.54lb, 700g)
Overall length with scabbard 53.25"
Big Steel Chinese Dao $499US plus shipping and handling of $35