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 general type]

Anotations

Scope note:

Length of a straight line measured downward from a plane or surface, or inward from a plane or surface. For the measurement or extension through or between opposite surfaces, prefer "thickness," although usage overlaps.