that is how borders end up ripply. The prepared border needs to fit perfectly and be fed together or there will be fabric left over at the other end
for seams, a yard-ish, I pin in the middle and be sure as I feed the 2 layers of fabric pinched gently between my fingers
Shorter than that I made sure they are even lengths going in and pinch gently as they go through, checking to make sure they are together at the rear end as I go.
even a 10" block seam can get off if not kept in check.
Last edited by KalamaQuilts; 06-12-2018 at 01:27 PM.