I just cut mine into rectangles (Hourglass seemed too much like hard work!!) and cut them so they were slightly bigger than the ones we already had, as the others seemed a little small.
I just bought a metre of rainbow fleece from a fabric shop and cut it up, the fun bit I have is finding the liner that goes with the nappy as I didn't cut them all the same. I cut some huge for night nappies and then some various different sizes/shapes so they perfectly fit certain nappies. It seemed a good idea at the time until I washed them all and then tried to match them back up again