All Bobbi Sunshine lycra swimwear sizes are based on Australia Standard Sizing Guides, which is to coincide with the children ages. The sizes range is from 0, 1, 2, 4, 6, 8, 10, 12. These sizes are due to last between the ages, ie: size 2 will fit 2-3yr old children, size 4 will fit 4-5yr old children, and so on.
General customer feedback is that Bobbi Sunshine swimwear is sized very generously - particularly rash shirts. Many customers need to go down a size for a good fit.