Size 1: For those under 30 who have never delivered vaginally or by cesarean section.
Size 2: For those over 30 and those who have delivered vaginally or by c-section.
Although the difference between the two sizes (Size 1 is 1/8" (0.3 cm) smaller) is so minimal, it is important to use the recommended sizing to prevent leakage.
We recommend Size 2 if you're 30 or over 30 years old, because as we age, our hips naturally widen and the vaginal muscles lose elasticity. Because the vaginal muscles hold The DivaCup in place, it's important to use Size 2 if you're over 30, even if you haven't given birth.