**I also forgot another step to picture!!!!!! You have to actually quilt or tie your quilt through all 3 layers once you are done basting or pinning! How much quilting or tying you do depends entirely on how much use the quilt is going to get. If you plan to machine wash and sew the quilt, do make sure you quilt it in lines of approx. 2 to 3 inches apart (the Warm 'n Natural Company says 4", but a little closer to be safer). If you are going to tie the quilt, I have found crochet cotton to be the best thread for tying a quilt - floss has a tendency to unravel even before it reaches the washing machine. Crochet cotton if you double knot it tightly holds up very well. Make sure you place your "ties" fairly closely if you plan to machine wash your quilt. There is no shame in tying - in fact for a "One Yard" or "Fat Quarter" quilt meant for a short life span for a baby, it is an easy and fast method to complete a quilt that can still be machine washed and dried.**
You WILL be glad you did.
The alternative method - Two Ways:
Start by lining up your ruler (either a clear one assuming you don't have a rotary cutter) or an opaque ruler to the correct mark - in this case I recommend 1 3/8". The pictures do show 1 1/4", but after thinking about it, there is a lot of room for error in this method and like I said, you can't glue it back on afterwards.
The fun part is next - rolling over the edges of the backside quilt: the goal is that the backside of the quilt becomes the binding visible on the front side of the quilt - sort of like a frame.
Here are some steps from my son "rolling and hand sewing using a slip-stitch":