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It's fairly easy to add a simple collar to a neckline. After sewing the shoulder seams, measure the length of the neck opening from center front to center front. Cut a rectangle a couple of inches longer by 7" wide. Interface one half (the facing) and baste that raw edge to the right side of the garment. Turn the opposite raw edge under 1/2". RST, sew the ends of the collar even with the center fronts and trim. Turn and sew the folded edge over the seam. This collar will not form lapels.
Beautiful bags can be made by using a large scale print tie as the focal point. To prolong the life of the bag, stabilize the tie fabric by fusing a light-weight interfacing to the back before cutting and piecing. Use your favorite simple bag pattern and construct the main pieces from pieced-together neckties. Piece to a stable foundation or quilt the pieces before constructing the bag.