Hi, All charms and any woven fabric for that matter has a stretch side and a side that doesnt' give. Width/selvedge to selvedge stretches. Straight grain/verticle length doesn't... so if you're sewing a seam that is made up of 2 sides from the wof you will have more stretch than if you sew a seam that is made up of 2 sides from the straight grain of fabric. keep the wof side on the bottom when sewing the seam. Pinning the seam at the middle and the very end will help keep the seams even. I am a firm believer of starching and pressing all my fabric before cutting. I even starch and press jellyroll strips. It really makes a difference when handling and sewing them. Hope this helps.