Choose Customize - Preferences - Viewports, and set Non-Scaling Object Size (default=1.0 in current units).Note: This also changes the size of light icons, helper objects, and other non-scaling objects in the scene.
Choose Customize - Preferences - Viewports, and set Non-Scaling Object Size (default=1.0 in current units).Note: This also changes the size of light icons, helper objects, and other non-scaling objects in the scene.