To Display Model Size
1. Click > 
Model Size. If you are in Assembly mode, the SELECT dialog box opens.
Model Size. If you are in Assembly mode, the SELECT dialog box opens.2. Select the model (component) that you want size information about and click OK. The length of the bounding box diagonal for the assembly appears in the Message window, and the bounding box appears in green around the selected model.
If you are in Part mode, the length of the bounding box diagonal appears in the Message window and the bounding box appears in green around the selected model.
 | To remove the bounding box, repaint or rotate the model. |