To best answer this, speak to a representative by calling 844.336.4499. Gauging how much data someone needs differs between each person based on the internet activities your household does.
With that being said, as of November of 2015, research shows that the median average per household in North America is roughly 57 GB per month. With more and more internet using devices entering your home, you can expect this number to increase. As of May 2018, the average Ritter internet customer uses 300 GB of data each month. If you want to know more about what type of activities equal how much data usage, check out this helpful infographic.