What is a convenience bonus?
convenience bonus
Fitted, close-fitting, loose-fitting, semi-close-fitting and wide fit – these are terms that can be found in the measurements in the catalog and on our pattern covers.
These are the standards at Vogue, Butterick, McCALLS, KnowMe, KwikSew, and Simplicity, and they tell you exactly what to expect in terms of fit. Each fit provides a general value for ease allowances included in the pattern.

Ease allowance is the amount of "room" in a garment beyond the body measurements; the specific amount of ease allowance varies from model to model.