Your first suit, six weeks before grad

Start six weeks out. Not because a suit takes six weeks, but because the tailor does, and because the good rental stock at your local shop gets picked over fast when every guy in your grade needs the same thing on the same weekend.

If you're reading this four days before grad, don't panic. Skip to the fit checks. You can still get this right. You just have fewer options.

The one thing that decides everything

A suit jacket fits at the shoulders or it doesn't fit at all.

Everything else can be adjusted. Sleeves shortened, waist taken in, trousers hemmed. But the shoulder seam is built into the jacket's structure, and moving it means rebuilding the whole thing. No tailor is doing that for grad.

So when you try a jacket on, look at where the shoulder seam lands. It should sit at the edge of your shoulder, right where your arm starts. If it hangs out past that and makes a little divot, the jacket's too big. If it's pulling and bunching, too small. Try the next size.

That's the test. Shoulders first, then worry about the rest.

Rent, buy, or borrow

Renting gets you a jacket and trousers that fit for one night, usually with a shirt and tie in the package. It's cheaper than buying something decent. The downside is that rental suits are built to survive hundreds of wearers, so the fabric tends to be heavy and a bit stiff, and you're returning it Monday with nothing to show. If grad is the only suit event on your horizon, renting is a completely sensible call.

Buying costs more up front but you own it. And here's the part nobody mentions: you're going to need a suit again sooner than you think. Weddings. A funeral, which will come with no warning. Job interviews. A scholarship dinner. Church at Christmas. Owning one navy suit that fits you means you're never the guy scrambling on a Tuesday because something happened.

Borrowing from an older brother, a cousin or your dad is free and often the best-looking option, because it's probably better fabric than anything you'd rent. The catch is that it has to be close in size already. A tailor can take a jacket in a bit. He can't let out what isn't there.

Whichever way you go, budget for alterations. A cheap suit that's been hemmed properly beats an expensive one flapping around your ankles. Every single time.

The fit checks, in order

Do these in front of a mirror with someone else in the room. You can't see your own back.

• Shoulders. Seam at the edge of the shoulder. Covered above.
• Jacket length. With your arms hanging straight down, the bottom of the jacket should land around the middle of your hand, roughly where your fingers start. Modern styles run shorter. Don't go so short it looks like you've outgrown it.
• Sleeves. The jacket sleeve should end at your wrist bone, with about half an inch of shirt cuff showing. If no shirt shows at all, the sleeve's too long. This is the single most common fix and it's usually quick.
• The button. Do up the top button only. Never the bottom one, ever, on a two-button jacket. Undo everything when you sit down. If the fabric pulls into a sharp X across your stomach when it's buttoned, size up.
• Trousers. They should sit on your waist without a belt straining to hold them there. The hem should just touch the top of your shoes, with a small fold or none at all. If there's a puddle of fabric on your shoe, get it hemmed.

Bring the shoes you're actually wearing to the fitting. Trouser length depends on shoe height, and guessing gets it wrong.

Color, and not overthinking it

Navy. That's the answer if you want one.

Navy works in photos, works in daylight, works in a dim gym, works at a wedding two years from now, and doesn't fight with whatever anybody else is wearing. Charcoal gray is the other safe choice and looks a little more serious.

Black suits read as funeral or tuxedo. A light gray or tan suit looks great outdoors in June and slightly odd indoors at night. If grad is a daytime garden thing, lighter is fine.

Shirt: white. If you want to be interesting, light blue. Skip patterns.

Shoes: brown or black leather lace-ups, polished the night before. Black shoes with a navy suit is fine. Brown shoes with a navy suit is better. Whatever you pick, the belt matches the shoes. Brown shoes, brown belt. That's the whole rule.

Socks are dark and long enough that no shin appears when you sit. Nobody will compliment you on this. Several people would have noticed the alternative.

Learn the tie knot on a Tuesday, not on the night

Pick the four-in-hand. It's the simplest knot, it makes a slightly asymmetrical shape that looks natural, and you can learn it from a video in about fifteen minutes.

Practice it six or seven times until your hands know it. Then practice once more on the morning of grad so it's fresh.

The tie should end at the middle of your belt buckle. Longer looks sloppy, shorter looks like a mistake. Getting the length right is just a matter of where you start the wide end, and you'll dial it in after two or three tries.

If your grad is a tuxedo event, that's a bow tie, and a pre-tied one is not a crime at seventeen.

What actually goes wrong

The tailor's busy week. Everybody brings their suit in the same seven days. Go early or you'll be told they can't get it done.

Not trying the whole thing on together. Suit, shirt, tie, belt, shoes, socks, all at once, at least two days before. That's when you discover the shirt collar is tight or the shoes rub.

Wearing brand-new leather shoes with no break-in. Wear them around the house for a few hours across a couple of evenings. You have a long night of standing ahead.

Forgetting to eat. It's a big day, things run late, and a guy who hasn't eaten since noon is not having a good time by nine.

Then stop thinking about it

The point of getting the clothes right in advance is that you get to forget about them. Nobody remembers what you wore. They remember whether you were good company.

So show up on time. Thank whoever's hosting, and mean it. Stand for the photos your mom wants, including the ones with your grandparents in the driveway, and don't sigh about it, because she'll have that picture on the wall for thirty years. If you're going with someone, be the guy who's easy to be around all night — kind to her friends, kind to the staff clearing tables, not disappearing.

A suit that fits buys you one thing. It buys you the freedom to pay attention to everybody else in the room.

Go and be worth remembering.