I too measure from the center and that is how long the strip is regardless....cut two the same wideth....fold in half and mark the center and mark the center of the quilt....I pin the centers together......and then match the ends....
That's the way I do it too except I measure both sides. They have been off by as much as 3/8"--how the heck does that happen :shock: Then I take the averge of the 2 sides and cut 2 border strips the same length. Pin in the middle, then on the ends, then just keep pinning and adjusting the fabric if I feel something lumpy.