Summary

Spirella Catalogue (1933) — Page 27 (1933)

A change in the centre front below measurement always includes the same change in the length of the inner belt, when inner belt is used. The inner belt will not be lengthened or shortened below the waist except when a corresponding change is called for in the centre front below measurement of the garment proper.
Source: Wikisource

Spirella Catalogue (1933) — Page 27 (1933)

The comparatively long length in these garments from waist to top at over bust with the shorter measurement at centre front is necessary to preserve the function of the design. In deciding on the correct waist to top (over bust) measurement for your client's needs take into consideration the relative heights of the garment at centre front and under arm. The long waist to top measurement can be worn in these designs because of the shaped line around the top.
8. The under bust measurement can not be specialized.
Inner Belt
9.
Source: Wikisource

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