Originally Posted by Quiltgranny
Also, what type of thread you use for piecing can make a big difference on the outcome, too. Many quilters have switched to using 50 weight 2 ply for piecing instead of the traditional 3 ply. It makes a HUGE difference!! My piecing has improved tremendously just by switching to a 2 ply, like Aurafil or any other 2 ply. They are just as strong as the 2 ply, but thinner so they take up less room in the seam.
Karla, you just gave me an epiphany! I haven't been paying much attention to thread weights when I piece. It never occurred to me that it could significantly affect the piece size.