Buying a suit off the rack is an exercise in knowing which compromises are permanent and which ones cost eighty dollars to fix. Almost nobody explains the difference, which is how men end up in suits that will never fit no matter how much they spend at the tailor.
The rule that governs everything: buy for the shoulders and the chest. Everything else is adjustable.
What can’t be fixed
Start here, because these are the only things that should make you put a suit back on the rail.
The shoulders. The seam must end exactly where your shoulder ends. Too wide and the fabric collapses into a divot below the seam; too narrow and it pulls into wrinkles across the top of the sleeve. Rebuilding a shoulder means dismantling the jacket — some tailors will do it, most won’t, and it costs more than the suit is usually worth.
The chest, if it’s too small. A jacket can be taken in almost indefinitely. Letting it out depends entirely on how much seam allowance the manufacturer left, and on cheaper suits that’s often close to nothing. If the button pulls into an X across your chest, size up.
The lapel roll and the collar. How the lapel curves and how the collar sits against your neck are functions of the jacket’s internal construction. A collar that gapes at the back is sometimes correctable and often isn’t — check before you buy, not after.
What a tailor fixes easily
- Sleeve length — $20–40. Should end at the wrist bone with a quarter-inch of shirt cuff showing.
- Trouser hem and break — $15–25. The most common and most transformative single alteration.
- Waist suppression (taking in the jacket sides) — $30–60. Turns a boxy jacket into a fitted one.
- Trouser waist — $20–40, up to about two inches either way.
- Trouser taper — $25–50. Narrows the leg through the thigh and knee.
- Jacket length — sometimes, $50–80, and only if the pockets allow it. Ask first.
Budget $80–150 for alterations on any off-the-rack suit. This is not optional spending; it’s the difference between a suit that fits and a suit you own.
The fitting-room checklist
Six checks, in order, while wearing the shirt and shoes you’d actually wear with it.
1. Shoulder seam. Stand square. The seam should sit on the edge of your shoulder — not past it, not short of it.
2. The hand test. Fasten the top button. You should fit a flat hand between the button and your chest. Any tighter and the fabric will pull into an X.
3. Collar gap. The jacket collar should sit flush against your shirt collar all the way round. A visible gap at the back is a construction problem, not an alteration problem.
4. Raise your arms. The whole jacket should lift with you rather than pulling at the shoulders. If it binds across the back, it’s too small regardless of what the chest measurement says.
5. Jacket length. It should cover your seat entirely. Modern cuts run shorter, but anything above the seat is a fashion cut with a short shelf life.
6. Sit down. Unbutton first. The trousers shouldn’t strain across the thigh and the jacket shouldn’t ride up your neck.
The things salespeople won’t volunteer
Half canvas beats fused, and it’s worth asking. A fused jacket has its interfacing glued to the fabric; over time and dry cleaning it can bubble and delaminate. A half-canvassed jacket has a floating chest piece that moulds to your body over years. Full canvas is better still and usually starts around $800. Half canvas at $400–600 is the sweet spot.
The fabric weight matters more than the season it’s sold in. A 9–11oz wool works most of the year in most climates. Anything under 8oz is a genuine summer suit; anything over 13oz is winter-only. Shops will sell you a lightweight suit in March and it will be useless by November.
Super numbers aren’t a quality score. Super 150s isn’t better than Super 110s — it’s finer, which means softer and more fragile. For a suit you’ll actually wear weekly, Super 100s to 120s is more durable and holds its press better.
Trousers wear out first. If the suit is offered with two pairs of trousers, take it. The jacket will outlast the trousers roughly two to one.
Colour, in order
- Navy — first suit, always. Works day and night, every season, every occasion short of black tie.
- Charcoal — second. More formal, correct for funerals and conservative business settings.
- Mid-grey — third. Daytime and summer.
Black is a specialist item, not a first suit. It reads severe in daylight and is genuinely only correct for evening formal events and funerals.
For wearing it once you’ve bought it, see how to wear a suit. For which dress code needs what, business formal and cocktail attire.
Frequently asked questions
What should you check when buying a suit off the rack?
The shoulders and chest above everything, because neither can be meaningfully altered. Check the shoulder seam ends exactly at your shoulder, that you can fit a flat hand between the fastened button and your chest, and that the collar sits flush with no gap at the back.
What can a tailor actually alter on a suit?
Sleeve length, trouser hem and break, waist suppression, trouser waist and taper, and sometimes jacket length. What cannot be fixed affordably is the shoulder width, a chest that’s too small, or a badly constructed collar.
How much should suit alterations cost?
Budget $80–150 total for an off-the-rack suit. Sleeves run $20–40, trouser hemming $15–25, taking in the jacket waist $30–60, and trouser tapering $25–50.
Is a half-canvas suit worth the extra money?
Yes. A fused jacket has interfacing glued to the fabric, which can bubble and delaminate over time and with dry cleaning. A half-canvassed jacket has a floating chest piece that moulds to your body over years. Half canvas at $400–600 is the value sweet spot.
Does a higher Super number mean a better suit?
No. Super numbers measure fibre fineness, not quality. Super 150s is softer and more fragile than Super 110s. For a suit worn weekly, Super 100s to 120s is more durable and holds its press better.
TL;DR
- Buy for the shoulders and chest — neither can be fixed
- Budget $80–150 for alterations, always
- Half canvas over fused — ask, they won’t volunteer it
- Super numbers measure fineness, not quality. 100s–120s for a weekly suit.
- Navy first, charcoal second, black is a specialist item
— Mr.Wayne
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