Here's a step by step on how it looked to make it. I start with about 21 feet of rope. The first two knots are the noseband knots, with the left one 82" from the end, and the next one about 10 inches away.
Making the Fiador- start with the right hand length (the long side)
The Fiador before tightening it:
And tightened, it becomes the knot below the chin that the lead line gets attached to:
Remove the tape, and using the long (right side) end make a knot 6 " away (5 " for a yearling) - the jaw knot. The next knot is 9 inches away (7 for a yearling) and becomes the knot and loop for fastening the halter when it's all done.
When you tighten this knot, leave about a two inch loop for doing up the halter. Take the rope and run it 9 inches (7 for a yearling) to the noseband knots, making another half knot inside the existing half knot, which now becomes a double overhand knot. Here's how you make a double overhand knot:
The first overhand half knot
Making the second overhand half knot inside the first one so that it becomes a double overhand knot and looks like this when tightened:
Then do the next noseband knot, making sure there are no twists in the rope. The next knot is for the offside and is the last knot using this part of the rope- it should be 9" away (7 for a yearling).
The remainder of that piece should be plenty long enough for tying the halter. Next, take the original short end that comes out of the Fiador knot, and make a knot inside the jaw knot. Then run it up to the last knot you made in the other rope -9' for a horse, 7' for a yearling:
Tie your last double overhand knot there, and even up the remaining lengths. Before you really tighten down all the knots, it's a good idea to try it on the horse first in case you want to adjust the length in between knots, as every horse is different.
You can finish the ends in a number of ways- copper tube, shrink tube, splicing. or what I used is some industrial grade reflective safety tape.
The best part is trying it on Rio and it fits!
I made one for Chickory too, and have enough left over to make puppy chew toys for Merle.