Gomon Custom Clothing · Suit Buying Guide
How Should a Suit Fit? A Visual Guide to Every Detail
Short answer: A correctly fitted suit comes down to five checkpoints you can verify just by looking in a mirror: the shoulder seam sits exactly at the edge of your shoulder bone with no overhang or dimpling, the jacket hem just covers your seat, the sleeve ends just above the wrist bone with about half an inch of shirt cuff showing, the collar sits flush against your shirt collar with no gap or bunching, and the trouser break — how the fabric falls over your shoe — matches the look you want, from a crisp “no break” to a fuller traditional break. Get those five right and almost everything else about how a suit looks follows from them. This isn’t about your measurements or your size number — it’s about how the finished garment actually sits on your body once it’s on.
In this guide:
- Shoulders — the one thing that can’t be fixed with alterations
- Jacket length — the seat rule
- Sleeve length and the shirt cuff rule
- The collar gap test
- Trouser break — no break, half break, or full break
Shoulders — the One Thing That Can’t Be Fixed with Alterations
Start here, because it’s the single most important checkpoint and the hardest to correct after the fact. Per Suitsupply’s fit guide, “the jacket’s shoulder should rest snugly along your shoulder’s natural form with no overhang.” If the fit is off, it shows up as a specific, visible flaw: “too loose a fit, and you’ll get excessive fabric & a shoulder seam falling below the shoulder.” Look in the mirror from the side and straight on — the seam where the sleeve meets the jacket body should sit exactly at the edge of your shoulder bone, not drooping past it onto your arm, and not pulling inward and creating a dimple. A tailor can take in a waist or shorten a sleeve easily; reshaping a shoulder seam is a much bigger, more expensive job, which is why this is the first thing to check before anything else.
Jacket Length — the Seat Rule
Jacket length has a simple visual test. Per Suitsupply’s guidance, “your jacket’s hem should only just cover your bottom” — not stop short of it, and not hang well past it. Both directions are easy to spot once you know what to look for: “if the hem of the jacket is sitting above your rear, it’s far too short,” and on the other end, “if it falls past the bottom entirely, longer than the arms, it’s too long.” Stand sideways in a mirror and check where the hem lands relative to your seat — that single reference point tells you more than any general “does it look right” impression.
Sleeve Length and the Shirt Cuff Rule
Sleeve length is one of the few fit checkpoints with an exact, memorable rule attached to it. Per Suitsupply, “your jacket sleeves should reach just slightly above where your thumb bone meets your wrist,” which should leave “half an inch (1.5cm) of your shirt sleeve visible for a proper aesthetic.” That strip of visible shirt cuff isn’t a styling flourish — it’s the actual fit signal. If you check your sleeve and “none of the shirt is visible at all,” that’s a sign to reconsider the jacket size itself rather than just shortening the sleeve, since a sleeve that’s hiding your shirt cuff entirely is often a symptom of the jacket being oversized overall, not just long in the arm.
The Collar Gap Test
This is the checkpoint most guys never think to look at, and it’s one of the clearest tells of a jacket that doesn’t match your posture or build. Per Suitsupply, “a correct fit will have the jacket collar resting naturally against the shirt collar, with neither significant pressure nor gaps between the layers.” Have someone check your back while you stand naturally: if there’s visible daylight between the jacket collar and your shirt collar, or if the jacket is riding up and bunching at the back of your neck, that’s a structural fit issue in the shoulders or back — not something a quick hem adjustment solves.
Trouser Break — No Break, Half Break, or Full Break
“Break” describes how the trouser hem falls over your shoe, and it’s a style choice as much as a fit one — but each style has a precise visual definition, per Black Lapel’s guide to trouser breaks:
- No break: “The hem of your pants will sit just above your shoe,” reaching “but does not rest on the top of the dress shoe” — the cleanest, most modern look, with no fold in the fabric at all.
- Half (medium) break: The hem “makes solid contact with the front of the shoe and forms a slightly visible wrinkle” — a single subtle fold, the most common and versatile choice.
- Full break: The hem “makes substantial contact with your shoes,” forming “a single, generous but elegant wrinkle… covering most of the shoelaces” — the most traditional, most relaxed look.
None of these three is objectively “correct” — it’s a style preference layered on top of proper length, not a pass/fail test the way the shoulder or collar checks are. A slim, modern suit usually reads best with no break or a half break; a more classic or traditional cut can carry a full break without looking sloppy.
Getting Every Checkpoint Right with Gomon
Every checkpoint above depends on the suit being built to your actual proportions, not a stock size you’re hoping lines up. Gomon builds each suit from your own submitted measurements, so the shoulder seam, jacket length, sleeve length, and trouser break are set for your body from the start rather than left to chance on a rack. Standard production runs about 20 days, with a two-week expedited option available, and if any checkpoint above doesn’t land right once the suit arrives, the process starts with alterations first.
FAQ
What’s the most important thing to check when trying on a suit?
The shoulders. A shoulder seam that doesn’t sit right at the edge of your shoulder bone is the hardest and most expensive fit issue to correct with alterations, so it’s the first thing to verify.
How long should a suit jacket be?
The hem should just cover your seat — not stop above it, and not hang well past it. Checking from the side in a mirror makes this easy to judge.
How much shirt cuff should show below a suit sleeve?
About half an inch. If none of your shirt cuff is visible, the jacket is likely oversized overall, not just long in the sleeve.
What does a gap between the jacket collar and shirt collar mean?
It usually signals a fit problem in the shoulders or back, not something a simple hem or sleeve adjustment will fix on its own.
What’s the difference between no break and full break on trousers?
No break means the hem sits just above the shoe with no fold. Full break means the fabric rests heavily on the shoe, forming one generous fold that covers most of the laces. Half break sits in between.
Is trouser break about fit or style?
Mostly style. Unlike shoulder or collar fit, none of the break styles is objectively correct — it’s a preference layered on top of properly measured trouser length.
References
- Suitsupply — How It Should Fit: Jacket — shoulder, jacket length, sleeve length, and collar fit standards.
- Black Lapel — Guide to Dress Pant Breaks — definitions of no break, half break, and full break.
Content prepared for Gomon (customclothinghere.com). Internal links to specific product/collection pages, and to the companion “Men’s Suit Size Guide” and “Made-to-Measure Explained” articles, to be added by the Gomon team before publishing.