The method I learned is faster, can be rotary cut and makes miles at a time. Much faster that starting with a square. I start with a yard cut of fabric, fold it crosswise, turn the triangle area to the top, fold each side towards the middle, which leaves you an odd shape. Trim off the folded edges, and cut strips 2.5" inches all the way down. (If you square your sides before you fold the fabric it does make it easier to connect the strips.) sew my strips together, iron it in half, and apply to the quilt. I do end up with extra length of bias, but I am now cutting the leftovers down the crease and using the now 1.25" strips, I am crochetting a rag rug and this makes the strips all the same width.