I recently taught a class about an hour north of where I live. I had 4 lovely ladies in the class and we had a great time making the scarves.
Here are thier layouts just before wetting.
And after much rubbing and rolling and a lunch break in the middle
They had some lovely scarves, this is the wool side.
And the silk side.
These where still wet so they will all lighten up as they dry. The difference in length is mostly do the lay out direction ( across or up and down) and some to how much fulling each person wanted to do. Everyone seemed happy with thier results so that makes me happy too.