I knew the width had more give than the length, but because I'm a new quilter, I hadn't encountered it much. Three of the four quilts I've made have had the borders grow slightly as they were handled. Two were high quality fabric and one was okay. The one that behaved was an inexpensive stiffer fabric I purchased for the color. On the one I'm finishing now, I deliberately cut the border strips short and they still grew slightly. Not so much they can't be quilted, but enough to make it harder and, yes, there is a tuck at a seam.