A suit is a wardrobe necessity. Even if you do not plan on wearing one every day, you'll need it for job interviews, business meetings, funerals, weddings and other special occasions.

While you have many options to play with, from fabric to stitching to detailing, correct fit is key. To look sharp, the fit must be right.

What should you look for in a suit?
Suit Fits
It really is all about the fit. The saying "the suit makes the man" is
right: a badly-fitted suit actually can make you look less dressed
up than no suit at all.
Slim Fit
Just like it sounds, Slim Fit is fitted closer to the body, without excess fabric. That doesn't mean it fits like a superhero bodysuit; Slim Fit can be worn by a lot of different body types.
Classic Fit
Classic Fit is comfortable and easy to wear. It's cut generously through the chest and waist, which means less constriction for you, but still maintains a clean body shape.
Modern Fit
Modern Fit falls between the other two: it's not too boxy, but it has more room than a Slim Fit. Modern Fit is a great choice for guys who want something a little more fashion-forward than Classic Fit, but are not sure they can pull off Slim Fit.
The most common style today is a two-button suit. If you only have a three-button suit, it's time to go shopping.
Flat-front pants vs. Pleated:
Flat-front pants are now the standard, though pleats can help give a little extra room at the waistline. If you want pleats, go for the most discreet, least billowy option.
A dated lapel style is the number one tipoff that your suit is older than you are. The width of your label should stylistically mimic the width of the ties you will be wearing. Fat ties are out, as are lapels as wide as a sail.
Notch Lapel
The Notch Lapel looks good at work, in meetings, and for job interviews, but isn't too stuffy for a date night or other social event. If you are not sure about what lapel to choose, stick with Notch.
Peak Lapel
Though the Peak Lapel is primarily used on double-breasted suits, a Peak Lapel on a single-breasted suit is now considered a sharp detail. Choose the Peak Lapel if you want to add subtle style.
Shawl Lapel
The Shawl Lapel is almost exclusively seen on tuxedos and dinner jackets, at weddings and black-tie events. A Shawl Lapel on a jacket adds graceful lines. If you're looking at a jacket with a Shawl Lapel, likely it is formalwear, or it is seriously fashion-forward.
Vents can dramatically change the fit of a suit.
Center Vent
As the name implies, the cut goes up the middle of the jacket. A Center Vent should lie closed when you are wearing your jacket, or the jacket fit is not right.
When you purchase a suit with the right fit and the details that best reflect your personal style, you are making a smart style investment -- one that will last for years.
Side Vent
Side Vents let you put your hands in your pants pockets without the jacket bunching up and allow the jacket to lie smoothly in the back when seated. Side Vents can also make a jacket appear slimmer.
No Vent
Some jackets do not have a vent. This is a fine choice for those who want a clean, sleek look, but can make for a less forgiving fit