here is a way to do them w/o the papers:
http://www.quilterscache.com/H/howtospeedpiecehsts.html The papers are good if you need a SLEW of the same colors. I always seem to need scrappy..or just a few in that size/color. There is a computer program called Triangulations that you can print out any size papers you need. I bought packages of a couple diff sizes a LONG time ago. I still have most of them... You can also draw out on a piece of paper with a ruler what you need. I like to size my HST a bit larger than needed and trim them. It takes a bit more work, but in the end I get a better quilt.