1, scissors are needed to cut the buttonholes of trousers, so you need a pair of scissors. You can have a knife without scissors, but be careful not to hurt your hands.

2. Method: First, fold the sewn buttonhole in half in the middle, and then cut it with scissors. Pay attention to the stitching on both sides of the buttonhole when cutting. The length of the cut should be the same as the diameter of the button, and it should not exceed the seam of the buttonhole, otherwise the buttonhole is too big to fasten the button.

3. If the buttonhole of trousers is cut big, you can sew it smaller with a needle and thread; Or take the pants to the tailor's shop and ask the master to make them smaller; Or change the button to a bigger one so that it can be buttoned. When cutting buttonholes in trousers, pay attention to the stitches on both sides of buttonholes. When cutting, don't exceed the stitching. The length of the cut is the same as the diameter of the button.