How to Choose the Right Flange Size
Our NCVI breast pumps come standard with four flange sizes: 21mm, 24mm, 28mm, and 32mm. You can also purchase additional converters for smaller sizing: 17mm or 19mm.
Measuring Your Nipple Size
- Stimulate your nipple so it stands out naturally.
- Use a ruler to measure the diameter of the nipple base — do not include the areola.
- Use the measurement to determine the best flange fit.
Size Guide (No Table Format)
- If your nipple measures 12 to 14mm:
Use 21mm flanges with a 17mm converter (sold separately). - If your nipple measures 14 to 16mm:
Use 24mm flanges with a 19mm converter (sold separately). - If your nipple measures 16 to 18mm:
Use 21mm flanges as-is. - If your nipple measures 19 to 21mm:
Use 24mm flanges as-is. - If your nipple measures 22 to 24mm:
Use 28mm flanges as-is.
Helpful Tips
- If you're pregnant, consider going up a few millimetres in size, as nipple size can increase after childbirth.
- A proper fit is essential for comfort and efficient milk expression.
- If you're unsure or experiencing discomfort, we recommend speaking with a Lactation Consultant.
