Let's take it from the beginning. DON'T just start sewing at one end of a side and stitch to the other end. Your quilt edges will be wobbly.
Here's how to do it, whether by hand or machine.
I'm assuming each side will be sewn on separately, make adjustments for mitered lengths.
1. Measure the middle of your quilt from side to side and top to bottom. Don't measure the edges
2. So if the edge measures 86 inches, but the center measurement is 84.5 inches, cut the binding 84.5 + 2 inches extra for corner turns.
3. Fold the binding and quilt into half and quarters and mark. Match the binding markings to the quilt markings. Yes, the quilt will have ripples because the binding length is shorter than the quilt. The excess for corners will hang off the quilt. Pin the binding to the quilt, working in the quilt's excess. It won't show when sewn on. Now stitch, using either hand or machine. It doesn't matter if you attach to the front and roll it to the back or attach to the back and roll to the front, that's personal preference. After the one edge is attached, and when it is rolled over to enclose the raw edges of the quilt, I hand sew the final edge on. Now repeat this process for the opposite edge, then do the top and bottom edges. If the quilt is slightly larger than the binding measurements, the quilt will end up square and flat--no rippled edges.
SandyQuilter