Usually boil it and use high temperature to restore its shape.

1. You can use a steam iron. Just place the steam iron about two centimeters above the clothes with one hand, let the steam slowly soften the fibers, and then use the other hand to shape the sweater. By using both hands together, the sweater can gradually return to its original state of denser fibers, just like new.

2. Just soak the sweater in cold white vinegar water, then gently rub the sweater with conditioner. Let the conditioner stay on the sweater for about thirty minutes, then wash it with cold water. Wring it out and spread it on a towel to air dry. After the sweater is dry, fold it and place it in a sealed bag in the refrigerator or freezer for 24 hours. You can wear it the next day without pilling.

3. Immerse the entire sweater in warm water of 30℃-50℃, or steam it in a pot for 20 minutes, and let it slowly recover its shape. Until its shape is almost restored, put it into cold water to set. . Finally, remember not to wring it out when drying, but to lay it flat to dry. This is a very effective method for dealing with oversized sweaters.

The reasons why sweaters become longer after washing:

1. Because the sweaters are not dried after washing, but hung directly on hangers to dry in the sun, the results become longer.

2. If the sweater is made of pure wool, you can soak it in warm water at 30 to 50 degrees and let it slowly recover its shape. Until its shape is almost restored, put it in cold water to set it. Finally, remember not to wring it out when drying, but to lay it flat to dry.

3. When drying sweaters, because there is a lot of water on the clothes, the center of gravity is overwhelming the clothes underneath, so they grow longer; it is best to lay them flat to dry.