Size: (XS) S (M) L (XL) 2XL (3XL)
Bust: Aprox (80cm) 90cm (100cm) 108cm (118cm) 127cm (135cm)
Pick the size with a bust measurement closest to your own. It is a negative ease pattern, and so has built in stretch, meaning the measurements above are not the finished jumpers measurements, but the size it will fit best with the built in stretch.