Why Fit Comes Before Fabric

Walk into any tailor's shop and the cloth books will tempt you: fine Yorkshire worsteds, soft West Country flannels, sturdy Cheviot tweeds in every shade of heather and moss. Resist for a moment. A suit cut from the loveliest cloth in the room will still look apologetic if the shoulders sit wide or the trousers puddle around your ankles. Cloth is what the eye notices from across the street; fit is what the eye notices when you are standing in front of it. Happily, fit is the part you can control. Learn to read four or five key details and you will choose better than many men who have been buying suits for thirty years.

Start With the Shoulders

Everything hangs from the shoulders, and they are the hardest part of a jacket to alter. Put the jacket on over a shirt you would actually wear with it, stand naturally, and let your arms hang. The shoulder seam should finish at the outer edge of your shoulder bone — roughly where the shoulder begins to curve down into the arm.

• Too narrow: the seam bites into the arm, the sleeve head puckers, and the chest pulls when you reach forward.
• Too wide: the seam droops past the shoulder, leaving a hollow and a dent where the sleeve joins.
• Too much padding: the shoulder line looks like a coat hanger rather than a shoulder. A little structure is traditional; a lot looks dated.

Shoulders can be narrowed only by a skilled alterations tailor, and widening them is effectively impossible, so this is the one detail to get right off the peg.

The Chest, Back and Waist

Button the jacket and look at yourself side-on. You want enough room to breathe and to sit down without strain, but not so much that the cloth billows. A useful test: slide a flat hand between jacket and chest — snug, not tight. Then check the back in a mirror. Horizontal creases across the shoulder blades mean the jacket is too tight or too short in the body; a collar that stands away from your neck means the same. Diagonal creases pulling from the button towards the shoulder usually signal a chest that is too small.

The waist button should sit at your natural waist, a little above the navel, and the jacket should follow the small of your back gently — not squeeze it. As for length, the hem should cover your seat, landing around the knuckle of your thumb with your arms hanging. Too short looks fashionable for one season and mean forever; too long shortens the leg.

Sleeve Length and the Shirt Cuff

Aim for a quarter to half an inch of shirt cuff showing when your arms hang naturally. More than that and the jacket looks borrowed; none at all and the cuff looks stunted. The jacket sleeve itself should end at the wrist bone.

Check both sides separately, because most men have one shoulder slightly lower than the other. Also look at the sleeve pitch: the sleeve should follow the natural forward curve of your arm, not twist. If the sleeve has working buttonholes, shortening must happen at the shoulder, which is costly — worth knowing before you fall in love with a jacket that needs two inches off the cuff.

Trouser Break, Rise and Hem

The break is the fold where the trouser front meets the shoe. It is a matter of taste, but it must be deliberate.

• Full break: one soft fold resting on the shoe. Traditional and generous, best with a wider leg and heavier cloth.
• Half break: the hem just kisses the shoe. The safest choice for most men and most shoes.
• No break: the hem skims the shoe without touching. Sharp and modern, but unforgiving — it suits a slim leg and a light cloth, and it exposes the sock the moment you sit down.

The rise matters as much as the length. The waistband should sit at your natural waist, not slung beneath the belly, and the fork should be comfortable when you sit. Ask the tailor to set the back hem a fraction lower than the front so it hangs parallel to the floor, and keep a gentle taper through the leg — enough to look tidy, not so much that it grips your calf.

Cloth Weight and the Final Check

For a British wardrobe, weight matters more than a fancy Super number. Roughly 230–260 g cloth handles summer; 260–320 g is the year-round workhorse; 350–450 g drapes beautifully and shrugs off a cold, damp day. Fineness in the 100s to 120s is the practical sweet spot — finer cloth feels silkier but wears through sooner. Worsted gives a crisp line, flannel a soft one, tweed warmth and texture.

Finally, do the movement test in a full-length mirror, wearing your own shoes. Sit down, stand up, button the jacket, reach for your wallet, raise your arms. If the collar lifts away from your neck when you reach, the back is too tight. If the shoulders crease, try a size up and let a tailor take in the waist instead.

Alterations can fix the waist, the sleeve length and the trouser hem. They cannot fix bad shoulders. Get that one thing right, allow a little room everywhere else, and your suit will do the quiet work that good tailoring always does.