The Ring pessary, available with or without a supporting membrane, is primarily used for a mild first-degree uterine prolapse or a cystocele Bioteque Pessary Ring with Support Silicone Sizes: Size 0; RS0: 1.75 Inch Size 1; RS1: 2 Inch Size 2: RS2: 2.25 Inch Size 3; RS3: 2.50 Inch Size 4; RS4: 2.75 Inch Size 5; RS5: 3 Inch Size 6; RS6: 3.25 Inch Disclaimer: Please consult with your physician for the correct pessary size/type before purchase.