| R0 | R#0 / 1.75 in. Ring pessary | |
| R1 | R#1 / 1.95 in. Ring pessary | |
| R2 | R#2 / 2.25 in. Ring pessary | |
| R3 | R#3 / 2.50 in. Ring pessary | |
| R4 | R#4 / 2.70 in. Ring pessary | |
| R5 | R#5 / 2.95 in. Ring pessary | |
| R6 | R#6 / 3.25 in. Ring pessary | |
| R7 | R#7 / 3.45 in. Ring pessary | |
| R8 | R#8 / 3.75 in. Ring pessary | |
| R9 | R#9 / 4.00 in. Ring pessary | |