I agree with One More Quilt, charm quilts are only supposed to have one square of fabric with no duplicates, but postage stamp quilts can be any number of fabrics that you choose. I admired a postage stamp quilt at a quilt show and the quilter said that she had strip pieced several 1 1/2" strips together, then cut apart into 1 1/2" strips to speed the process. That works for me, I have enough trouble seeing 1 1/2" squares, let alone piecing them together. lol I'm sure your quilt will be gorgeous.