4. Hold the side seam on the other side and the side seam on your side, and put them close together.
Fold it into half along the back seam. Put the bodice and sleeves together.
(向こう側の脇縫いを持って手前の脇縫いに合わせ、背縫いに沿って二つに折る。身頃、袖を重ねる。)