[header] How to choose portion sizes for kids [title] Use ordinary objects to describe healthy portion sizes. [step] It's easier to compare portion sizes to everyday objects, especially for foods that are measured by mass or volume instead of by count. Doing so will help you teach your child how to choose the best portion sizes for themselves. 
[substeps] For example, bread can be counted by the slice, and one slice is one portion. Think of a two to three ounce (57 to 85 g) portion size of beef or poultry as a deck of cards.