Medela Breast Pump Parts - Breastshield size 21mm Small x 1 single
The breastshield is the part of the pump that fits directly over your nipple and forms a seal around the areola. It's very important that you have a correctly fitting breast shield, in terms of both comfort and how much milk you can express. The breastshield should tightly close around your nipple, while still leaving enough room for it to move back and forth.
Many women are not aware that breast pump shields come in different sizes, and that there is a lot of variation of nipple sizes - regardless of breast cup size. Having the wrong size shield can cause discomfort, and limit the amount of milk you can express.
All Medela breast pumps are originally sold with a 24mm (M) standard size breastshield in the boxed set, which suits most women. Though sometimes it isn't right - but it's something you'll only know after you have started using your pump. If you are finding that your nipple and too much areola are being drawn into the funnel part, then you should try a smaller size. (Refer to the Sizing Tab for more information).
This product listing is 21mm (x1 single)
Choosing the right Breastshield size for your Medela Pump
Pumping should not hurt. For maximum comfort and pumping efficiency, Medela pumps have five breast shield sizes available to suit all women. This guide below is a starting point, to help you determine your optimal shield size based on your nipple diameter.
Step One: This can be difficult, but use a ruler or measuring tape, to get the diameter of your nipple at base (across the middle), do NOT include areola. Measure in mm. Please refer to diagram below.
Our Tip: Use a piece of string to go around the circumference of your nipple base. Then measure this against a ruler. Apply some maths : circumference divided by PIE (3.1417) will give you the diameter.
Step Two: Based on your diameter measurement, determine the Breastshield size based on the diagram below. For example, if your nipple size measures 16mm diameter, the recommended Medela Breast Shield size is 21mm.
Reasons to Try a New Size
* Does your nipple rub the tunnel sides to the point of causing discomfort?
* Do you see excessive areola being pulled into the tunnel?
* Do you see redness?
* Is your nipple or areola turning white?
* Do you feel unexpressed milk after pumping.
If you answered YES to any of these questions, consider trying a new size by following the measuring instructions above.