I think it depends on the pattern style and you. If you are short and the pattern is a dress or pants, you will probably need less. If taller, then you will need more for length. Some patterns need to be cut in a certain way and therefore require a certain length/width and will leave waste and there is little you can do about it if you want to keep the drape. But, if you do much apparel sewing, I would always recommend to take the instructions out of the package and take a look at their layout before deciding how much fabric to purchase. A little tip - I often take my scraps/extra and make a small bag (or line a bag) to match the outfit. Especially with dresses for my daughters. It gives a nice little finishing touch and they always need a place for their phone and keys.