Bracketing Wool Blazers: The Shoulder Seam Tells the Truth

Stand in front of a mirror and find the bone at the end of your shoulder. The seam of the blazer should sit right on it. If the seam droops past the bone onto your upper arm, the blazer is too big. If it pulls in short of the bone, it is too small. Everything else about the fit is negotiable. This is not.

Wool makes the test easier and harder at the same time. A good wool cloth drapes, so a seam that is half an inch off still looks almost right in the mirror. Take a photo from the side. The camera is less forgiving than the mirror, and the seam shows up clearly in a photo.

Start at the seam, not the size

Wool relaxes with wear and with steam, and a blazer that feels close across the back on day one will usually settle. That forgiveness has a limit, though, and the limit is the shoulder. The shoulder is built into the jacket with padding and structure. It does not relax, it does not stretch, and it does not forgive.

The body of a wool blazer can be taken in or let out by a tailor for the price of a lunch. Rebuilding a shoulder costs several times that and rarely looks right afterwards. Judge the purchase on the part you cannot change, not the part you can.

Wool forgives a little, not a lot

Button the blazer and look at the front. A single horizontal pull line across the button means the chest is too tight, and the blazer will gape every time you sit down. No pull line, and the button sits flat, means the chest has enough room for the wool to drape.

Now sit down in it. A blazer that fits standing and pulls sitting is a blazer you will unbutton all day, which is fine if that is your habit and a problem if it is not. The sit test takes ten seconds and saves a season of tugging at the button.

The button test that actually matters

A tailor can shorten sleeves, take in the waist, and fix a hem. A tailor cannot move a shoulder seam without rebuilding the jacket, and rebuilding a shoulder on a wool blazer costs more than most blazers are worth. That is the whole economics of bracketing a blazer: order two, keep the one with the right shoulders, and let the tailor handle the rest.

Keep reading: Bracketing wool coats: layering room under the shoulder, Bracketing trail shoes: downhill toe room is the test.

What a tailor can and cannot fix

About one online apparel order in four comes back, per Coresight Research, and size and fit is the top reason. Two blazers ordered and one returned is cheaper than one blazer kept with the wrong shoulders and a tailor bill that never makes it right.

Frequently asked questions

Where exactly should a blazer shoulder seam sit?

Right on the edge of your shoulder bone. If it droops past the bone onto your upper arm, the blazer is too big. If it pulls in short of the bone, it is too small.

Can a tailor fix shoulders that are too wide?

Not cheaply. Rebuilding a shoulder means taking the jacket apart and remaking it, which costs several times what a sleeve shortening or waist adjustment costs. Shoulders are the one fit point to get right at purchase.

How much does wool relax with wear?

A little, mostly through the body and across the back, and steam helps it along. The shoulder does not relax, because it is built with padding and structure rather than loose cloth.

Should I button a blazer when I sit down?

Unbutton it. A blazer that fits standing will usually pull across the button when you sit, and sitting unbuttoned is the normal habit. Judge the fit standing, and judge the sit test by whether the blazer hangs cleanly once unbuttoned.