Short answer
Each shoulder is drafted separately — the pattern records the difference permanently.
Why it happens
Asymmetry everyone has and no size chart records.
Why ready-to-wear cannot fix it
Size charts grade uniformly; one shoulder lower is a personal geometry. A block adjusted in one place pulls in another — which is why the correction must exist in the pattern, not in the fitting-room mirror.
How the house drafts for it
Each shoulder is drafted separately — the pattern records the difference permanently. The correction is recorded in your Fit Passport, so every later commission starts from it automatically.
Where it matters most
This correction carries most for: suit, blazer, overcoat. It is reviewed at every fitting, in every city, for every garment.
Fit Library entry 3 of 48 · Reviewed by Bonturberg Editorial Review · 2026-09-08