Since I was making bias binding, I thought I would snap a few photos of the process along the way and share them here. This is one way to do it. A few of the photos are a bit less than stellar-sorry!-but you should still get the idea.
First, lay your fabric square on your cutting mat. Trim the left and right sides so the fabric is squared up.
Trim off the selvages as well.
Line up a ruler (or two rulers end to end if one ruler isn't long enough) on the 45 degree angle of your cutting mat. Carefully make your first cut.
Tip: The photo doesn't show this, but in order to maximize your fabric, line up the top left corner of your fabric right on the 45 degree angle line. You will get nice 45 degree angles on the ends of your fabric and no odd bits to trim off those ends.
Move your ruler(s) and either flip up or set aside the triangle (the piece on the top right hand side), but don't discard. It will be used later. Then, line up the ruler on the line that you just cut and measure the width of your binding strips. I cut mine 2.25" wide. Make as many cuts as you can from the fabric. I tend to move my fabric several times throughout this process. I've heard that once you make a cut in your fabric you shouldn't move it from that place on your cutting mat, but I do. I guess I am a rebel that way. I just make sure that the edges are lined up accurately before each cut. Repeat these steps for the triangle that you set aside previously.
Once all your fabric is cut up, take two strips and prepare to join them end to end. The nice thing about bias binding strips is the ends are already mitered for you.Since you are sewing on an angle, you will need to offset the binding strips just a bit. Pin. When you sew up the seam, if it is lined up correctly, you should be able to sew from notch to notch and get a perfect 1/4" seam. Flip the strip the right, and press. If the binding strip is offset at all (not in a straight line) rip the stitches and sew it again. It takes a bit of practice to get this just right, but it's not too bad, either. A few strips and you should be a pro.
Most of the strips will join together just fine, but when you have two ends that look like this, they won't miter together.
So, you have to line up your ruler as shown above. Use the 45 degree angle line on the ruler and make a cut. Set the triangle aside as a scrap or discard.
Now the two ends should be ready to miter. Repeat as directed in the steps above.
Once all the binding strips are joined together, fold in half lengthwise and press well.
Attach the binding as you would normally. (You can see my in depth binding tutorial here.)
When you get to the ends...your strips will probably look something like this.
Trim one end at a 90 degree angle.
Measure an overlap that equals the binding width. In this case 2.25" wide.
Trim.
Open up the ends of the binding strips.
On the left hand strip, fold the end and finger press as shown in the photo. This fold will be your sewing line. Mark it with a water soluble marker if desired.
Pin and sew on the line/fold.
Use a scissors to trim off the triangles, leaving a 1/4" seam allowance. Finger press the seam and line up the binding to the edge of the quilt. Sew into place.
After I attach the binding to the quilt, I like to trim off the excess backing and batting with a pinking shears. I like to leave just a bit of fabric and batting beyond the edge so the binding will be nice and full after hand stitching it down to the back.
If you have any questions about bias binding, I'll try to answer them in the comments.


