Quick answer

Start with a medium-sized cup if you have an average cervix height and average flow. If your cervix is low or your flow is light, a smaller cup works best; for a high cervix or heavy flow, go larger.

Why size and firmness matter for comfort

A cup that is too wide or too firm can press on your bladder or urethra, causing discomfort or difficulty urinating. A cup that is too soft may not pop open or could collapse during wear, leading to leaks. The right balance depends on your pelvic floor strength and cervix position.

Cervix height: the key measurement

Your cervix height changes during your cycle. On lighter days it sits lower; on heavier days it rises. Measure by inserting a clean finger and feeling for the cervix. A low cervix (within one knuckle) calls for a shorter cup; a high cervix (two or more knuckles) needs a longer cup.

Decision rules for choosing your first cup

  • Low cervix (within one knuckle): Choose a shorter cup (often labeled 'small' or 'mini'). A long cup will poke or cause discomfort. Look for a cup with a stem you can trim if needed.
  • High cervix (two or more knuckles): Choose a longer cup (often labeled 'large' or 'long'). A short cup may sit too low and not collect flow effectively, leading to leaks.
  • Heavy flow or strong pelvic floor: A firmer cup (often a larger size) resists compression and holds more volume. If you have a strong pelvic floor, a firmer cup also stays open better. If you experience leaks with a firm cup, try a softer one — it may seal better without pressing on your bladder.
  • Light flow or sensitive bladder: A softer, smaller cup is gentler on the bladder and easier to remove. It also requires less suction to stay in place.

Product facts

  • Purple Intimate Care Menstrual Cups: Conveniently flexible for easy insertion, with bell-shaped curves that hug contours and an ergonomic rim designed to prevent leakage. The flexible bell shape and ergonomic rim make it a good choice for beginners who are still learning to angle the cup correctly, reducing the chance of leaks during the learning curve.

    Purple Intimate Care Menstrual Cups

    Purple Intimate Care Menstrual Cups

Who this cup works for

Best for

  • Beginners who want a flexible, leak-resistant design
  • People with an average cervix height and moderate flow

Not ideal for

  • Those with a very low cervix who need a shorter cup
  • People with heavy flow who need a larger capacity cup