What is the difference between sleet and hail?

What is the difference between sleet and hail?

Answer

Sleet is partially frozen rain, measuring less than 5 mm (0.2 inch) in diameter. Hail is a round piece of ice that usually falls during thunderstorms. Its average size is 0.25, or 1/4, inch in diameter, although hailstones weighing up to seven pounds have been reported.