Since this is a bralette with a soft finish and no underwire the sizing is quite flexible.
Its best to use your underbust measurement and then reference your most comfortable bra for your current cup size. If you prefer a firm fit on your band (around your chest, under your bust), consider going down a size in the underbust.
X Small – Under Bust 25’ to 27’ (64cm to 69cm)
Small – Under Bust 27’ to 29’ (69cm to 74cm)
Medium – Under Bust 29’ to 31’ (74cm to 79cm)
Large – Under Bust 31’ to 33’ (79cm to 84cm)
X-Large – Under Bust 33’ to 35’ (84cm to 89cm)