If the knitted vest is too big, you can try the following methods to lose weight:

1. Measure your figure. First, measure your body shape to determine how much size you need to reduce. Pay special attention to the measurement of armholes and rear collar sockets.

2. Take off your vest. Take off all parts of the vest, including the front panel, back panel, sleeves and neckline.

3. cut. According to the required size, increase the underarm seam of the vest, and the specific increase depends on the proportion of reducing the overall size as needed. If you need to further reduce the size, you can also take more shots in the middle seam of the back. Pay attention to keep it flat when cutting, and avoid stretching or twisting the cloth.

Sewing. According to the color and thickness of the original sewing thread of vest as a reference, the thread with similar color and material is selected as the sewing thread. First put all the parts of the vest in alignment, and then sew them from the inside. When sewing, you should also keep a distance to avoid wrinkling.

5. iron clothes. After sewing, iron the vest to keep it flat and wrinkle-free.

It should be noted that the thinning of knitted vest requires certain sewing skills and experience, and incorrect technology may lead to deformation or looseness of vest. If necessary, it is recommended to seek the help of a professional tailor.