1. Select the pillow core and measure its size. Enlarge the cloth according to the size of the pillow, that is, leave room for sewing.

2. Prepare the cloth and cut it with scissors. Cut three pieces of cloth, one in the front and the other two in the back.

3. Wrap these three pieces of cloth separately.

4. Fold two pieces of cloth with edges wrapped together into a piece with the same size as the previous piece, and sew them into a whole piece along the two edges to ensure that the pillow core can pass through the gap in the middle.

Sew the front and back of the pillow into a pillowcase from the back with a sewing machine.

5. Turn the pillowcase to the front and insert the pillow core from the gap between the two rear pieces.

6. If the sewn pillowcase is not beautiful enough, you can embroider some patterns you like on it, which will make the pillowcase look more beautiful.