How to Properly Size Your Flange for Comfort and Efficiency: A Guide for Parents

As a lactation consultant, one of the most common questions I receive is about how to properly size a flange for a breast pump. Choosing the correct flange size is essential for both comfort and milk expression efficiency. An ill-fitting flange can lead to discomfort, reduced milk output, or even nipple damage. Fortunately, with a few simple steps, you can measure your nipple correctly and ensure that you’re using the correct flange size.

Why Flange Size Matters

The flange is the part of the breast pump that fits around your nipple and areola. A well-fitting flange helps create an effective seal that allows the pump to remove milk without causing discomfort or friction. If your flange is too small, it can compress your nipple, making pumping painful. If it’s too large, the suction may be less effective, and you may not express as much milk.

Step-by-Step Guide to Measuring Your Nipple

Before you choose a flange size, it’s important to measure your nipple accurately. This will ensure that the flange fits correctly, providing both comfort and optimal suction.

1. Use our Nipple Ruler (or a School Ruler)

You can use a nipple ruler to measure the diameter of your nipple. If you don’t have a nipple ruler, a standard school ruler will work just fine. Here’s how to measure:

• Measure the Tip of the Nipple: Place the ruler or nipple ruler at the tip of your nipple. Measure the width from one side of the nipple to the other. Be sure to focus on the tip of your nipple and not the areola.

• Add Slight Wiggle Room: The measurement should be taken to a diameter where the nipple fits comfortably within the circle of the flange with just a slight bit of wiggle room. There should be no squeezing or discomfort. Avoid adding extra millimeters to the measurement.

Once you have your measurement in millimeters (mm), that’s the flange size you should start with. For example, if your measurement is 15mm, then choose a 15mm flange.

2. Measuring with a Caliper

Another method for measuring the nipple is to use a caliper, which provides more precision than a ruler. When using a caliper:

• Place the Caliper Gently on the Tip: Hold the caliper at the tip of your nipple, ensuring it’s not compressing your nipple.

• Measure the Diameter: Look for the widest point of the nipple (especially if the nipple is irregularly shaped), and take the measurement.

This will give you a very accurate measurement that you can use to select the appropriate flange size.

3. Nipple Shape Matters

If you have a nipple that isn’t round or has a unique shape, it's important to measure the widest point of the nipple. This ensures that the flange fits comfortably and creates an effective seal. If your nipple is asymmetrical, measure both sides and use the larger measurement to determine the flange size.

4. What to Do Next

Once you've taken your measurement, you can match it with the corresponding flange size. Here’s a tip: do not add to the measurement. If you measured 15mm, use the 15mm flange. Using a larger flange than necessary can cause the pump to work less effectively and could lead to wasted time or frustration.

What If You’re Not Comfortable?

Sometimes, even after you measure, you may feel discomfort during pumping. If this happens, don’t hesitate to reach out to an International Board Certified Lactation Consultant (IBCLC). They can help assess your pump fit and ensure that you're using the correct size for both comfort and efficiency.

Get Your Correct Flange Size at Our Shop

If you're unsure of your flange size, or if you’d like to have it professionally fitted, you can get your correct flange size directly from our shop. We offer a variety of flange sizes to meet your needs, and our friendly staff can assist you in finding the perfect fit.

Book a Flange Fitting Appointment with Our IBCLC

If you need more personalized support, we also offer flange fitting appointments with our certified IBCLC. Our lactation consultants will work with you to ensure you get the most comfortable and effective fit for your breast pump. You can book an appointment directly through our website or by contacting us.

We accept medical insurance and offer a range of payment options to make the process as smooth as possible. We’re here to support you every step of the way in your breastfeeding journey.

Conclusion

Proper flange sizing is key to making your pumping experience as comfortable and effective as possible. Taking the time to measure your nipple accurately will help you avoid pain, discomfort, and inefficient pumping. Remember, no two bodies are the same, so don’t be afraid to experiment with different sizes until you find the one that works best for you.

You can always refer to the Flange Fit Guide for more detailed information on choosing the right flange size.

If you need personalized help, reach out to our IBCLC who can guide you through the process, ensuring a perfect fit and a more enjoyable pumping experience.

Happy pumping!