I followed the directions on this McCalls Quilting video. I used a 41″ square and I got a whopping 16 yards of 2 3/4″ bias binding. I don’t need that much to bind my octagons – I will keep the leftover for binding charity quilts.
I practiced on a smaller piece of ugly fabric I didn’t mind wasting if things went wrong. They did. The second time I got it right.
Just be sure that when you start drawing the lines across the fabric – that the seam is slanting to your left – or to the right – NOT vertical.
Whether the seam is facing right or left – don’t draw the lines on either of the #2 sides. The #2 sides are the ones you are going to sew together to make the tube.
Here is a little paper mockup of the fabric square cut in half on the bias. This is the way you should position it on your table if you have chosen to have the seam facing left.
NOT like this.
That is is a lot of blah blah blah to tell you DON’T DRAW THE LINES ON THE #2 SIDES. Easy really – I hope I didn’t confuse you.