The Claudine is super easy to adjust the width as well as the length. We don't go into detail regarding the length but it is done in the same manner as adjusting the width. We split the pattern piece and spread the pieces apart to lengthen/widen it and we fold a tuck to shorten it. The pieces just have to fit together after the alterations. So if you alter the A you have to alter the adjoining pieces the same amount as well.