Pick wide hangers made of wood. They are useful in hanging up suits, jackets and coats as well as sweaters. The width extends beyond the shoulders of most sweaters, thus preventing the unsightly bumps in the shoulder area.
Pick padded hangers to hang the sweaters in your closet. These are available wherever closet supplies are sold.
Invest in flexible hangers. These have foam that you can bend to fit any size sweater and help maintain the shape.
Fold your sweater in half lengthwise. Drape it over the bottom bar of a wood or thick plastic hanger. This prevents indentations in the shoulder area and stretching that may occur from hanging a bulky sweater.