How to sew buba and trouser

You fold ur fabric into two, u start from d edge of ur fabric, u start from ur back shoulder u divide it into two eg shoulder back 15,chest 40, waist 32,length 35, hip 42. It only d shoulder back will be divided into two while d remaining measurement will be be divided into four. For d trouser will fold it into two also and u will start from d edge of the fabric. The measurement is length 40, waist 36, hip 44 kneel 18, flab 26 ankle 14, not all will be divided into four, like d kneel, flab, ankle will be divided into two while d rest will be divided into four.