Here is the size chart for selecting Arena competition swimsuits for girls. These swimsuits are determined by your height, chest, waist, hip measurements, and your torso loop measurement to find your correct size.
If you happen to fall between two sizes, choose the size where you align with most of the measurements. Generally, the most crucial measurements are height and chest.
With Arena competition suits, the size also varies based on how much compression you desire. You can consider this factor if you fall between two sizes.