These punches are great for PMC Sheet. This particular brand is less expensive, but doesn't do cardstock as easily. For PMC Sheet, they work great. The approximate size of these punch out shapes are 15mm. After firing and shrinkage, about 12mm.
These are also great for Keum-Boo foil. Easier to use before annealing the gold, but if you use them after annealing, it is wise to place the gold inbetween a piece of folded tracing paper before punching. Fabulous ways to add a little hint of gold.
Zinc has increased tremedously. Therefore, the price of the punches have increased for 2007.