Knowledge
A trouser is generally made in the thicker fabric, which most of the times is available in a larger width of 60". Hence, one requires fabric piece for one length of the trouser plus 25cms, since two legs of the trousers have 4 pieces which can be cut two at one time by placing them in opposite directions on a fabric that is, folded half width wise. In case one is making a trouser in a fabric that has one way print one would need at least two lengths of the trouser.