These values are meaningless (useless) for calculating size and strength.
I am sure you can imagine what would happen if you start editing them to try to reflect the kinds of Girth values they "seem" to be at first glance.


Still i'll try to check some ingame mass values to see how much they are dependant on height and weight. I thought mass were only to check how easily a body can be dragged after death.
EDIT: Checked the following mobs with "getav mass" command:
Dragon - mass 4.00 = mass in CK / height 1.00 / weight 1.00
Deer - mass 2.00 = mass in CK / height 0.85 / weight 0.85
Elk - mass 2.00 = mass in CK / height 0.85 / weight 0.85
Wolf - mass 1.00 = mass in CK / height 1.20 / weight 1.00
NPC - mass 1.00 = mass in CK / height 1.00 / weight 1.00
SnowFox - mass 1.00 = mass in CK / height 1.20 / weight 1.00
Frostbite Spider [Small] - mass 0.25 = mass in CK / height 0.75 / weight 1.00
So far seems like mass value returned by "getav mass" command do not depends on height and weight values.
EDIT 2: Changed Horse Race Base Mass to 100. Getav command returned it correctly and there were no anomalities in horse (and mesh) behavior. After i killed horse i wasn't able to drag the corpse it was like glued to the ground. Additionally seems like the effect of Unrelenting Force shout was somewhat mitigated by mass
Ooops, horses can't be dragged. My bad. But unrelenting force has a bigger effect on horse corpse with 0.25 Mass. Will proceed to experiments on NPC.
EDIT 3: Changed Nord Race Base Mass to 100. Getav command returned value correctly. No behavior changes or other anomalities. Effect of unrelenting force was almost nonexistant - seems like NPC with mass 100 immune to staggering effect of 1st level of Unrelenting force.
On death NPC fall on the ground and almost immidiatly stop ragdolling but their corpses still can dragged around.



