Hierarchy classification:

1. top of the aat hierarchies
2. Physical Attributes Facet
3. Attributes and Properties (hierarchy name)
4. [attributes and properties by specific type]
5. form attributes
6. size/dimensions
7. [size/dimensions by specific type]
8. [size for book formats]

Anotations

Scope note:

Uncommon book format with 18 leaves and 36 pages, used in bookmaking from 1770-1840, but rarely used today. The most common method of creating the size is to fold a sheet in an accordian-fold, followed by an envelope fold, and a right angle fold.