I would pick the smallest diamond. Then pick one of the other diamonds, placing them right sides together. Check to see how far off the first seam is on the second one, and sew it to match the smaller diamond's seam. Continue doing this on all of the seam lines. Then match that same smaller one to another one of the diamonds the same way. I would not rip out the seams, as you would probably end up with more puckers and problems.
This may throw off your set in diamonds, you may have to cut them a little smaller to fit :wink: :D:D:D