The collar of the sweater is loose. In order to restore the original state, you can iron the sweater with hot water. The water temperature is preferably between 70℃ and 80℃. If the water temperature is too high, the sweater will shrink too small. You can also use iron method. High temperature will change the elasticity of the sweater, so you can also use an electric iron to shape the sweater at high temperature. First sew the loose neckline short with thread, and then iron it flat to dry. This sweater can be made.

1, first measure the neckline length before treatment with a ruler.

2. Then sew around the loose neckline of the sweater first, and make sure to connect them.

3. Then we use the left thread to pull out and tighten the original open neckline, and then the neckline is pulled together as shown below, so we must tighten it.

4. After tightening, we take out our steam iron or steamer, start ironing 2-3 cm above the contracted neckline, and heat it for about one minute, so that the neckline can feel the heat of steam.

5. Finally, take out the wire after cooling.

6. After dismantling the line, tidy it up and measure it with a tape measure. The neckline has changed from the original 16 cm to 14 cm.