Primarily used for second or third-degree uterine prolapse, a cystocele, rectocele, and stress urinary incontinence. Sizes Specs: 1 (DSHS1): 55 mm (2.16″) 2 (DSHS2): 60 mm (2.36″) 3 (DSHS3): 65 mm (2.55″) 4 (DSHS4): 70 mm (2.75″) 5 (DSHS5): 75 mm (2.95″) 6 (DSHS6): 80 mm (3.14″) Disclaimer:Please consult with your physician for the correct pessary size/type before purchase.Sorry, no return or exchange. Thank you for doing business with us.