OK, I made some vinyl pouches using the 3" X 2" X 1" alternative, 2 part, pattern in Obi-wan's Jedi accademy. They looked a bit small.
I played around with the sizes a bit and have now cut out my upgraded leather ones in 3 1/4" X 2 1/8" X 1 1/4". They look a little better, I have yet to stitch'glue them, but have just got a digital camera (Wooooohooooo), so I'll post my progress in a seperate post. Hard drive at home just went crunch (D'oh) so it may be a few days/weeks.
It was fairly easy to adjust the template. Print it off, then draw out your own using the same basic shape, but the new measurements. Voilá. Like with everything else doing this, if it looks proportionate on you, it's right, even if not screen accurate.
Hope this helps.
Si