The sleeve of your jacket should come up to the base of your hand, and should show off 1-2cm of your shirt cuff. If it doesn't fit, you should: take it to a tailor. Sleeves can be altered relatively inexpensively if they are a few cm too small or too large. 4. The Trouser Waist Regardless of how well your jacket fits, if your pants do not match your body shape, your suit will look disproportioned and unflattering. The waist of your pant should be comfortable yet snug. How to tell if it fits: Your pants should stay comfortably on your body without the aid of a belt. If you need a belt to keep your pants up, the pants do not fit If it doesn't fit, you should: take it to a talior. Having a pair of pants taken in along the waist is relatively inexpensive -- but, really, why not just buy a pair of pants that fits you in the first place? 5. The Trouser Legs The shape of your trouser leg dictates the fit of the pants, and varies widely for different cuts and styles. How to tell if it fits: Trousers should fall straight down your leg, without any creasing or bulges, with the hem of the pants falling right along the laces of your shoe. If it doesn't fit, you should : visit a tailor. Pants can be taken in along the seams without much hassle -- however, due to the lack of excess