When I first started quilting I made a scalloped edged table topper that required bias binding. At that time my mom taught me how to do bias binding, but I would only do it when she was around to help me. A year ago my brother got married and I needed (wanted) to do a bias binding on their wedding quilt so the strip would go diagonally on the binding, but mom wasn't around and it had to be done, so I did it myself and it turned out great. Now I've done bias binding a few times with her tried and true method and I don't mind it a bit.
Here's how mom and I make bias binding:
We use "The Quilter's Pocket Reference" An Easy Guide to Yardage and More by Peggy Schoolley. We refer to it as the Quilter's Bible because we use it so much. It's the little one with the turquoise cover. On page 24-25 it gives the size of square to make the amount you need. I needed 90" and I used a 2 1/2" binding, so my square was 16" I mark two x's on the top and two on the bottom as you see in the next two photos.
Cut the square diagonally from the upper left hand corner to bottom right.
Then take the bottom piece and fold up to the top. The X's are now together on the inside, right sides together. Offset the bottom piece (now on top) by 1/4" to the right which allows for the seam allowance.
I pin and then sew at a 1/4" to join the two pieces. I've marked where the X's are on the right sides, so you can which side to sew the 1/4" seam.
Then press the seam to one side or open, which ever you prefer. On the longest side, I use the rotary cutter and cut every 2 1/2". In this case I marked the lines, so you can see where I'm cutting. I do have an inch left, but leave it for now. I don't cut to the end, just an inch or so from the end.
Here's my approximately 1/2 to 1" left uncut at the end.
Here's all the binding cut and ready to sew. At this point, cut the extra piece off. (1" in my case"
I then shift if to one side to match up with the next piece. If you are attaching to itself and just have loops, it's wrong. It has to be off set and will cause these twisted loops.
At this point with the 1/4" seam sewn, you can see that there is about 2" to clip. At this point I either use a shears or rotary cutter to cut the little pieces.
I quick cut with the shears and my binding is done.
Here's the binding. You can see how I layed it so you can see the stretch of the bias in it. There are two seams in it which are in a trapezoid shape. Not sure it you can see the seams, but they are there.
Here's my 90" of bias binding.
Here's the binding on the top and bottom of my new bag. I had just enough! It's always better to make more than you need! I love that you can use a fat quarter to get a lot of binding made.
Hopefully someone will benefit from this tutorial. Let me know if you have any questions or want more clarification. Happy Bias Binding!