Guide · Suits

How to read a suit fitting — top to bottom

Updated: June 2026 · 4 min

2 min read

A suit that fits is almost invisible — you stop thinking about it, which is the point. Before you take one to a tailor, it helps to know which areas to focus on first and which fixes are straightforward versus genuinely difficult.

  • Shoulders and collar should fit off the rack — the rest is adjustable
  • Tug test: 2–3 cm of give at the button is ideal
  • About 1 cm of shirt cuff should show at the sleeve
  • Match trouser length and leg width when shortening significantly
  • Bring the shirt and shoes you will actually wear with the suit
Contents
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Where a suit is made or lost

A suit lives and dies at the shoulders and collar. Those are the hard, costly fixes, so it pays to get them roughly right off the rack — almost everything else can be adjusted.

What to check, top to bottom

Start with shoulders and collar — those are the hard fixes. Everything below them gets progressively easier.

  1. 01

    Check the shoulders first — no magic here

    The shoulder seam should end where your shoulder bone ends; if the jacket is clearly too tight or too wide here, changes are difficult and often expensive.

  2. 02

    Collar close to the neck

    The jacket collar should sit against the neck without standing off or wrinkling; collar corrections are among the most demanding alterations.

  3. 03

    Back and chest: smooth, with a little ease

    The back should sit mostly smooth, with only a small fold behind the arms; horizontal pulling or strong creases mean the jacket is too tight.

  4. 04

    Jacket length and shirt cuff

    From the front the jacket should roughly cover your seat, and about a centimetre of shirt cuff should show at the sleeve.

  5. 05

    Check the waist with a tug test

    Button the jacket and pull the front button gently; about 2–3 cm of give is usually ideal — much more means too loose, less means too tight.

  6. 06

    Waistband: holds without a belt, doesn't pinch

    Trousers should stay up without a belt yet stay comfortable when you sit or move.

  7. 07

    Match trouser length and leg width

    If more than about 4–5 cm comes off the length, the leg width often needs a slight adjustment so the proportions still work.

  8. 08

    Test movement: sit, walk, windmill arms

    Make a few moves — sit, climb stairs, circle your arms — to check nothing pulls, the button doesn't strain and the fabric doesn't bunch.

Bring the real outfit

Bring the shirt and the shoes you will actually wear with the suit, so the fitting reflects the real proportions instead of a guess.

More guides

Common questions about suit fitting

Which suit alterations are hardest?

Shoulder and collar work are the most demanding, so it's best if those areas already fit reasonably well off the rack.

How much shirt cuff should show?

About a centimetre of shirt cuff at the sleeve is the usual guide when the jacket sleeve length is right.

Can trousers be taken in at the waist?

Yes, the waist is one of the more straightforward adjustments; the goal is trousers that stay up without a belt but do not pinch when you sit.

What is the tug test on a jacket?

Button the jacket and pull the front button gently — about 2–3 cm of give is ideal; much more looks too loose, less pulls wrinkles.

Does the leg width need adjusting when trousers are shortened a lot?

Often yes — if more than about 4–5 cm comes off, the leg width usually needs a slight adjustment so the proportions stay balanced.

Should I bring my shirt and shoes to the fitting?

Yes — bring the shirt and shoes you'll actually wear with the suit, so the fitting reflects the real proportions.

See all questions

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