So apparently I had measured out the length, height, and torso width of a couple of the dinosaurs a while back (at least 2-3 years ago I'd say). For some reason I only did it for the three apexes and Shant, but I thought it was interesting nonetheless. I don't know if it's still 100% accurate or if they adjusted the models since then.
Anyway here are the numbers:
T. rex:
Length: 12.4 meters (40.68 feet)
Height: 4.05 meters (13.29 feet)
Width: 1.7 meters (5.58 feet)
Giga:
Length: 12.1 meters (39.70 feet)
Height: 3.9 meters (12.80 feet)
Width: 1.35 meters (4.43 feet)
Spino:
Length: 14.6 meters (47.90 feet)
Height: 3.8 meters (spine not included), 5.3 meters (spine included) (12.47 and 17.39 feet respectively)
Width: 1.3 meters (4.27 feet)
Shant:
Length: 15.25 meters (50.03 feet)
Height: 5.3 meters (17.39 feet)
Width: 2.1 meters (6.89 feet)
I suppose one potential application of this would be to attempt to find the approximate volume of these four models, but seeing as I only have enough measurements to model them as rectangular prisms, it'll definitely be approximate.
Rectangular T. rex is apparently 85.374 cubic meters.
Cube Giga is 63.7065 cubic meters.
Spino-prism is 72.124 cubic meters not including the spine, including the spine in the calculation gives a volume of 100.594.
Shantohedron is 169.7325 cubic meters.
The actual volume of the models would probably be less than half of these numbers (probably closer to just 1/3 or 1/4), however seeing as T. rex is commonly estimated with a weight around 8,500 kilos, simply multiplying these numbers by 100 gives very, very rough estimates of their weight.
Though it's not a difficult calculation I'll include the numbers anyway.
T. rex: 8,537.4 kg (18,821.75 lbs)
Giga: 6,370.65 kg (14,044.88 lbs)
Spino: Between 7,212.4 and 10,059.4 kg (15,900.62 - 22,177.18 lbs)
Shant: 16,973.25 kg (37,419.61 lbs)