Full Idea
The paradigmatically 'categorical' properties are spatio-temporal, depending on how things are distributed in space and time. Shape is the obvious example. ...Other examples are number, size and configuration.
Gist of Idea
Typical 'categorical' properties are spatio-temporal, such as shape
Source
Brian Ellis (Scientific Essentialism [2001], 1.09)
Book Reference
Ellis,Brian: 'Scientific Essentialism' [CUP 2007], p.46
A Reaction
I'm finding it very frustrating that this concept is much discussed in current philosophy of science (e.g. by Bird), but it is exceedingly hard to pin down any exact account of these 'categorical' properties, or even why they are so-called.