According to those sources, Apple is testing displays as large as 13 inches for the iPad and larger than four inches for the iPhone.
As a point of reference, the current iPad has a 9.7-inch screen, the iPad Mini has a 7.9-inch screen, and the iPhone 5 has a four-inch screen.
Before you get too excited, it's important to note that Apple tests different product variations all the time. Today's report doesn't mean you're going to get a giant iPhone or iPad any time soon.
But it does mean Apple is at least thinking about releasing its iconic products in different form factors, perhaps as a way to combat its