The strips are cut - 3.5 inches and 6.5 inches.
Put them right sides together, iron lightly, pin in place, and its time to sew. Remember, 1/4 inch seam allowance and no need to backstitch at the beginning and end.
Press the seams towards the darker fabric. You DO NOT press the seams open like clothing construction. Press both seams towards the darker fabric being careful not to form creases in the seam.
Ta Da! Now, do this "x" amount of times depending on the size of your quilt. Next step, cutting this piece smaller.