Gravity interprets Maya’s units as meters. When the working units of your nCloth’s scene is not set to meters (such as Maya’s default centimeter working unit), you may need to adjust the Space Scale of your nCloth’s Maya Nucleus solver. Otherwise, the large-sized nCloth objects in your scene may not behave as desired. For example, when Space Scale is 1.0 (default), Gravity treats a 100 centimeter wide nCloth object like it is 100 meters wide. To improve the behavior of your large-sized nCloth objects, reduce the Space Scale value.
See also Maya Nucleus solver properties.
To work with large-sized nCloth objects