First I need to apologize for the quality of the photos. I thought if I used a plaid fabric, it would be easier for you to see what was bias and what was straight of grain. This was a rather small woven plaid, and unfortunately, digital cameras don’t like them very much and make them come out looking like moire instead of plaid. Hopefully you can get the idea, though.
Once you’ve determined how big a piece of fabric you need, we’ll fold it so it’s easy to cut. First press it to remove the fold that’s formed when the fabric is doubled on the bolt. Then re-fold, lining up the selvages so the two layers of fabric lay smooth and flat with no puckers. The cut edges will probably NOT be even – don’t worry about that, just trim them off so they are even and perpendicular to the selvages. You DON’T really have to start with a square of fabric (it can be a rectangle), but you DO want the sides to be at a 90 degree angle to the selvages.
IMPORTANT – You only fold selvage to selvage to trim the cut edges perpendicular to the fold/selvage. Then you need to unfold again before the next step, so that you are only working with a single layer of fabric.
Now take the top right corner and bring it down and to the left, aligning the edges along the bottom. This should give you a nice 45 degree angle (see how it matches up with the 45 degree angle mark on my mat?).
Then bring the bottom right corner up and to the left along the 45 degree fold you just made.
It’s still too big to cut comfortably, so bring that bottom right fold up over itself:
And the extra little ‘flappy thing’ at the top gets folded also:
You can fold again if needed to have a nice neat package. Basically you just need to get it small enough to fit the size ruler you’re going to use.
I’ve now rotated the package 45 degrees clockwise, this will make it easier for me to cut.
Then I trim off the fold:
I used to use the ‘tube’ method where you sewed one long seam to make a tube, then marked and cut the tube into a continuous piece of bias binding. I was never all that happy with that method – seems like I had to do a lot of ‘fiddling’ to make it come out right. So now I prefer this way. How do you like to make bias binding?