Short answer
The shoulder seam is re-drafted to your true angle and the sleeve head is wadded to bridge the drop — the collar sits closed again.
Why it happens
The shoulder line falls steeper than the block the garment was cut from.
Why ready-to-wear cannot fix it
Size charts grade uniformly; sloping shoulders 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
The shoulder seam is re-drafted to your true angle and the sleeve head is wadded to bridge the drop — the collar sits closed again. 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 1 of 48 · Reviewed by Bonturberg Editorial Review · 2026-09-08