Originally Posted by zozee

Beverly-- typically leaders they are equal sized squares that you sew together before running your "good" fabric under the needle, which sometimes "eats" the corners." Enders are ones you can use after , although I've never had a problem once I've gotten started chain piecing. Eventually all the 2 patches add up to 4P, 9P, etc. So you are essentially making a second quilt as you make your current one.