I have found that if I use 2 1/4 in and fold in half and sew with 1/4 in seam, it works well. If I need a 3/8 in seam I use 2 1/2 in binding. I sew it on the back of the quilt and bring it to the front. There have been times I have needed a ruler to keep it straight, but overall, it works well.