Somebodies already did the work on this topic.
I'm just making mashup contrasty pictures of it.
I like her version the best. It's almost just like all the real ones I've seen, and she gives you the instructions for assembly.
But this is hard to see.
And there's a free pattern for a similar thing, which we're going to borrow. But let me make this clear, this is Mad Housewife's Idea. This is.... the children's book version.
If you combine her ideas with their pieces, you get a pretty nice collar for free. Her recommendation to stretching the smaller undercollar and showing the results is sweet.
Go read it on her page!
Then come back.