I would like to take a moment to talk about precut kits. If the pieces are precut, they are cut to the size they need to be. Anything you do to them will change their size and shape, therefore DO NOT wash, wet, steam press prior to or during the piecing process. If you want to press seams, do not use steam, as it will distort your pieces. This is a cautionary tale, and one that will prove costly. Most of these kits are cut using some sort of laser method and do not allow for shrinkage prior to piecing. Once the quilt is pieced and quilted, you can then wash it. If there is any shrinkage at that point, it will not matter as the quilting will prevent any major distortion.