Thanks to all the input here I think I have settled on Cavallos. I’ll get measurements once my horse is home (fresh trim) and order a set!
I believe the Scoot Boots will be my “next” pair, if we stay the barefoot-and-boots course. I’m hoping this horse can at least be a moderate trail partner, and we are in a rocky area.
As far as break in and stuff goes: this horse is a thin skinned TB, and I expect rubs from pretty much anything. Should I invest in some pastern socks, vetrap, or anything? I won’t start off with anything but the boots, but I’m planning a consistent schedule for this horse so I’d rather be prepared.