Clayton's pretty damn tall. He towers over Sora, Jane, and the rest. I think 1.9 meters shouldn't be so unreasonable.

Lots of scaling.
(1.9/178.576)276=2.94m
(1.9/178.576)661=7m
2.94*7=20.58m^2
(1.9/178.576)690=0.734m
(1.9/178.576)352=3.745m
.734*3.745=2.74883m^2
(1.9/178.576)150=1.6m
(1.9/178.576)207=2.2m
1.6*2.2=3.52m^2
20.58+2.74883+3.52=26.84883m^2
So that's the total area.

That's at least the width. Sora's 14 in KH1, but probably a little on the short side. 1.524m is the average height for 12-13-year-olds based on findings from my other calcs, IIRC.
Anyway...
(1.524/130.33)137.6=1.6m
26.84883*1.6=42.96m^3
Seems to me violent fragmentation works just fine. Indeed, most of it seemed to have been pulverized.
42.96*1000000*120=5155200000J
or about 1.23 tons.