First,drag a TLabel component to a form.

Then,set TCAD's LabelValue property as Label1.
Last,it will show shape's size when you add a shape.
Also,it can do it by code.

Code example:

procedure TMainFrm.Button1Click(Sender: TObject); 
begin 
  MyCAd1.LabelValue:=Label1; 
  //... 
end;