The sizes

0 means "Up to 8 months" 

1 means "Up to 14 months"

2 means "Up to 24 months"

3 means "Up to 32 months"

4 means "Up to 42 months"

Note: These are the garment measurements. The measurement may vary slightly depending on the style/type of the dress. We recommend adding "1-2" inches larger than body measurement for comfort and easement.