I made a shark tooth but my tooth is bigger than sharks head :-) How to RESIZE moedeled shapes in MoI ???

Best to you all

Menu Transform/ Scale
And you have choice 1D, 2D, Scale(3D) (one axe, 2 axes, 3 axes) on the same time
On your case Scale seems better :)
You must train a little for take the Origin point, first and second point reference for obtain that you want

Cool.....thatnks. Now I have good proportions teeths :-)