Researchers say a big part of the problem has to do with serving size.

Which one to buy is a matter of taste, serving size and budget.

Are you having a hard time figuring out serving sizes?

Sometimes it might not be so easy to compare serving sizes.

We haven't been clear enough on serving size, and that issue needs to be addressed.

Another point of difference between the two agencies is over the question of serving size.

The individual serving sizes are only 1 gram, would that have anything to do with it?

Your only problem will be stopping at the eight-chip serving size.

Offered in three serving sizes, the medium was deemed more than enough for most people.

Some of them lodge their entire heads into the hay for the maximum serving size.