It is difficult for the best of us to estimate proper portion sizes. Below are some visuals that can help you Eat Right.

A fist is equal to one cup. This is equal to two servings of pasta or one serving of raw fruit or vegetables.
Four stacked dimes is the size of a serving of fat.

A computer mouse is the serving size of a baked potato.
A serving of canned fruit or cooked vegetables is about the size of a tennis ball.