Man At Arms did a MLP inspired chamfron for Rainbow Dash. Here is the link.

Being sentient small equines, our favourite little ponies would be quite prepared to sit for fittings and would have armourers every bit as good as the best mediaeval and Tudor smiths. Their stuff was like slightly heavy tailored clothing, not at all the encumbering heavy stuff you see in some old dramas.
 
(I also kinda want to see a light armour/summer dress combination somehow. Think what you could do with a chainmail or lamellar bodice and shot silk, darling.)
 
@Background Pony #36CB  
Yeah, the artist upstream admits the champron needs a pair of eyeguards, but also to yielding to the Rule of Cute.

Really useful!
 
 
@The Toaster Repair Pony  
My series does too.

@Fimbulvinter  
A caparison isn’t really armor and would hide lots of the other parts, so I left it off. There could also be rerebraces and greaves, but on this suit the crest of the sabatons rise high enough to cover the lower legs.

This list is incomplete. Where’s the Caparison?

@Background Pony Number 17  
Even an arm or a leg could be severed by a blow, and they would likely be harder to damage than the unprotected horn, so it would make sense to try and cover the horn in some way.  
If it needs to be exposed to work making, maybe a kind of tubelike construction running the length of the horn and leaving only the tip free?
 
Considering the size of the eyes, they should also be covered as part of the helmet.  
Ears too.  
In general the whole helmet might be a bit too tight fitting. Not much room for padding between helmet and head under there to absorb blows stopped by the armor or allow depression from dents made by such blows.

Badass and educational. XD

This is horsearmor.

Most of them are derived from names for the body parts they protect. Bit none so blatantly lampshaded as gardequeue. Literally, “tail guard.”

So THAT’S what a sabaton is.

Gorget. Very important addition.

@Sparkler  
Horns don’t need armor; they’re weapons, not vulnerable areas.
 
A horn-cover, though, would probably be called a scabbard, same as for a sword.

Wow, nice work!

headcanon-accepted.gif

I’m surprised there’s no term for armor that covers a horn.

unsurprisingly, the only terms in italics are for the pieces on the wings.

Well, this is extremely helpful for fiction writers. Thank you!

Fallout: Equestria’s the only story I’ve read that used the term “barding”.