I use a 2.5 inch width binding, which gives me a 3/4 inch binding once sewn. Sew on back using 3/4 inch seam. Fold to front. Fold under & pin in place using the thread line as a guide. Folded edge should be just over the thread line. Then I sew usually @ 1/8 inch, which will show the same on the back. When I do corners I sew to seam line, flip/fold it, tuck it in using a stilletto, pin & sew around the corner.