In Arabic usage, expressions from jasāmah can indicate largeness or bulk, and jasīm may describe a large object. This does not, without argument, determine the technical definition of jism.
Example: A small stone is a body, and so is a larger stone. The larger can be more massive without having a greater degree of “being a body” in the classificatory sense.
The error to avoid is treating increase in quantity as direct evidence for the essential definition of a kind of thing.