Word to encompass object's location or size

Wiktionary's sense 3 of geometry is suitable:

the spatial attributes of an object

That is the sense used in X Window System geometry specifications, which may specify width, height, x-offset, and y-offset, or may specify width and height.

Sounds like "coordinates" might be a possible - at least with respect to position as noted by X, Y, and Z axes. Those are spatial. Height and width are dimensional.

On a side note, the machine used in the Dr Who series is called "TARDIS," which stands for "time and dimensions in space."

They are in the category of "Layout" of Microsoft Visual Studio Windows Forms Designer.