Cup size, from B to E, the fit is soft, so they are suitable for a broad range of cups.
The underbust measurement is the best inclination of a firm fit.
X Small – Underbust 24’ to 26’ (61cm to 66cm)
Small – Underbust 26’ to 28’ (66cm to 71cm)
Medium – Underbust 28’ to 30’ (71cm to 76cm)
Large – Underbust 30’ to 32’ (76cm to 81cm)
X Large – Underbust 32’ to 34’ (81cm to 86cm)