In this Forum, I found this:
Now, you may be asking yourself, “What in the world do noodles have to do with quilting and what is a fabric noodle?”. Simply said, a fabric noodle a strip of fabric that is the length of the measurement of the width of the fabric (WOF). In other words, a 2.5″ noodle would be a strip that was 2.5″ wide by the WOF, which usually ranges between 40″ - 44″.
So, I've decided a worm could be 2.5" x 1/2 the WOF.
(Personally, I don't like the term worm either, but I'm doing what the leader wants.)