I have been waiting for this thread ;-)

The best answer I have found is keep fooling with them until you are happy.

I try to make mine look as much as possible like the Duke of Rothesay's, say 1/2" to 3/4" of fringe only showing, and overlapping so it looks like one widish piece of fringe sticking out from the hose.

I spent a bunch of time searching, had to figure it out myself, and then my next pair of garter ties came in a different length than the first pair. By two inches.

Just keep fooling with them. If you have a target you will eventually hit it.