You can take it to the tailor's shop to cut it short, or sew it short yourself, so that you can get rid of the lengthening in the future. The specific operation method is as follows:

1, prepare a needle and thread, sewing from the side of the clothes, starting from the bottom and starting from top to bottom.

After the needle goes in, the needle is under the clothes. Just take out the needle and insert it in the middle seam from top to bottom.

3. Then sew a needle from top to bottom on the other side of the middle seam, and then insert it into the middle seam to continue sewing from top to bottom.

4. Keep sewing like this to form a staggered fishbone as shown below, and sew wherever you want.

5. Then, pull the thread up, hold the closed place with your fingers, and find that the clothes on the side have become shorter.

6. You can compare the two sides. The sewn side is obviously much shorter than the one without sewing.