Maureen is right. If you make a 9-patch from the 2.5" squares, using a 1/2" seam, it will measure 5.5" unfinished. When joining the charm to a 9-patch you would have to align the pieces so that you have a 1/2" seam allowance on the 9-patch and a 1/4" seam allowance on the charm. It could be done, but it would be difficult and confusing. Can you get another 2" die to make cutting the 2.5" pieces down a little easier?