All the patterns I've made with pre cuts required they be recut for the pattern. I recently had an interesting experience. i purchased a Moda charm pack. I then chose a quilt patten and realized that I needed an additional pack, which I puchased from a different vendor. When I got the 2nd pack, I washed them both (swished them in the sink in warm water with a bit of detergent, then used a salad spinner). One pack shrunk, the other didn't. So glad I laundered them first!