Make sure your binding is full.
When you prepare your quilt top for the binding, trim the excess batting and backing off leaving 1/8" of the batting and backing sticking out beyond the quilt top.
Align your binding with the edge of your quilt top. Leave the 1/8" of batting and backing sticking out beyond the edge of your top. Sew your binding to the front of the quilt top using a 1/4" seam.
Fold your binding to the back and hand or machine stitch. When you pinch your binding it will feel full not flat.
My friend Laura taught me this simple trick during a class at our local quilt store many years ago. She said the judges will check your binding for fullness if you enter you quilts in a quilt show or local fair.
Hand stitching bindings on my quilts is one of my favorite ways to relax after a long day at work!