Default value for height and width of components in UIPickerView

What is the default value for the height and width of components in a UIPickerView? that is, what value does iOS use as height and width for lower if the application has not implemented these methods?

pickerView:widthForComponent:
pickerView:rowHeightForComponent:

I tried a suggestion from the stream: What is the default width of a UIPickerView component? But this will give an array from the exception:

Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[NSMutableArray objectAtIndex:]: index 0 beyond bounds for empty array'

Any help was appreciated.