There is a bit of a trick, at least it works for me, when you birth a quilt. When quillows were popular I learned them. First if you cut your backing about 1/8"shorter on all sides when you turn out it will roll to the underside just a hair so no backing shows on top side. And before turning out cut the batting as close to the stitching as you can, and cut corner triangles close to stitching ...this will eliminate a lot of the bulk. Also, at corner don't just make that sharp turn, make one stitch on diagonal, then swing to the direction you want...gives a better looking corner.....like I said, these work for me when making tablerunners, placemats, etc.