Here is the size chart for selecting Fin Fun mermaid tails for kids. These mermaid tails are based on measurements of your waist, hips, and waist-to-floor length to determine your correct size.
Usually, size is chosen based on age, but if you happen to fall between two sizes, it's recommended to choose the size where two measurements fit best. You don't need to consider the size of your feet, as the design accommodates all foot sizes.