Some are bigger than the standard 5". I was making a 9 patch using Windham and Moda charms. The Windham were way bigger, so it threw off my 9 patch by about 1/4". I made another with Riley Blake and Moda, and they went together perfectly. I know a lot of people had to trim their LOVELY charms that were used in the Iron Quilter contest. I used my 5" charm template and that went quickly.

So, I don't think it is just one manufacturer that has problems. I've gotten half pieces in some precuts. Very frustrating!