This looks great! How long were your strands to get the right length for your collar? Thanks for the linky too - awesome!
I measured the front of the collar which was like 18 inches so i multiplied by two to get the strand length. I then doubled that for a string length since you fold a piece in half for 2 strands. I just guessed with 60 inches and I didn't braid to the end, I also ended up cutting off a good 10 inches in the end.
Best to start with long strands but hold the piece up to whatever it is to check length as you go.