Originally Posted by bearisgray

I DO NOT cut the threads at the seam line. I unsew the threads by picking them out with a seam ripper or pin. I think cutting the threads at the seam line weakens the thread and might make the unit more prone to coming undone.

I usually leave about 1/4 of an inch of threads beyond the edge of the fabric when I can.

Of course, that isn't possible when sewing units from strip piecing.