You can soak the shrunk wool scarf in white vinegar or borax, and then lengthen the shrunk place, so that you can repair the wool scarf.

Tools and articles needed are: borax (white vinegar), birdbath and towel. The specific steps are as follows:

1, and the ratio of water to borax is 2: 1 or 500ml white vinegar per liter of water, as shown in the figure:

2. Soak the scarf in warm water for at least 25 minutes. When soaking, gently rub the scarf and gently stretch the scarf. As shown in the figure:

3. Take out the soaked clothes, wring them out, lay them flat on the towel and roll them into a ball. Then wring it out and let the towel roll clothes 10 minutes or so. As shown in the figure:

4. Finally, take out the scarf, flatten it and dry it, as shown in the figure:

If it shrinks too much, it is recommended to send it to the dry cleaner.