Here is a website that describes the various grades of tea and how teas are graded. Admittedly grading tea is complicated, but once you get the hang of it, you can easily determine the grade yourself. Or at least you can be sure that you are indeed getting what the tea store is selling you!! So mouse over to this link and learn how to grade teas.

Grading Teas

Alternately, you can mouse over to Jaya Teas section on grading teas which here here.