The cervical cap comes in different size, ranging from 22 to 26 mm. A pelvic examination by your doctor or healthcare provider will determine which size you need based on your obstetrical history e.g. women who never have been pregnant will use a smaller size than women who have had delivered a baby. Smaller or larger sizes are then inserted until the correct fit is achieved. It should fit snugly into the upper half of the vagina. The woman should practice insertion under supervision and placement should be inspected to ensure that the fitting ring is correctly positioned in the vagina. The cervical cap may require resizing following a full-term pregnancy, pelvic surgery, or abortion, or if there is a major change in weight. It is recommended that the cervical cap gets replaced every year or even sooner if it shows any signs of deterioration.