What a Roman horsebreeder wanted. . .
(Pelagonius, Ars Vet., quotes in Morgan 1962, page 115)
I also find, on an SCA website:
"Often, it is assumed that earlier period warhorses were smaller, around 11 or 12 hands and that later period horses were larger, around 18 hands. Fifth century Sarmatian burial sites yield horse skeletons of up to 15 hands in height (Equis, pg 22). Bones of horses found in a Roman fort in Scotland (Equis, pg 25) were from horses from 11 to nearly 15 hands. "
Where 'Equis' is a reference to: Hyland, Ann, Equis: the Horse in the Roman World, Yale University Press, 1990
I'm in Iraq with an unreliable internet connection. You'd think a friggin' PhD student who obviously had a lot of time and resources on his hands could have figured this out. I know the SCA is hardly a source you could cite in an academic paper, but Ms. Hyland's book most certaintly is.
Especially since Ms. Hyland's methods apparently include basic common sense principles like, "Hey, let's take this Roman horseshoe, copy it, and stick it on some modern horses to see what size of horse it fits!"
Then again, I find that occasionally 'Serious Historians' have great beef with this sort of thing, preferring to publish papers on possible alternative translations for an obscure word in a badly copied manuscript in a dead tongue which might bear on the topic.