In llGetPrimitiveParams, we have the ability to get PRIM_SIZE, which is a vector giving us the bounding-box size of the prim. It is possible for the physics shape to be something other than the visible size of the object, making it rather tricky to deal with. What's more, based on the scale of the object, the physics size is sometimes altered automatically.

It would be very handy to be able to detect the size of the object's physics shape in order to work flexibly with the circumstances.