How to Measure for Right Breast Pump Flange Size?

How to Measure for Right Breast Pump Flange Size?

Pumping can be a stressful process, which is why it's important to ensure that you are using your breast pump properly. One of the most important elements of your breast pump is the flange. If you aren't using the correct size flange, your pumping may be ineffective or potentially even painful and uncomfortable.

The following guide will help you understand what a breast pump flange is intended for, why the size of your flange matters, how to tell if it's fitted correctly--and finally, how to measure the correct breast pump flange size for your needs.

Discover how to accurately measure your nipple size with our comprehensive Nipple Measuring Guides to find the perfect flange fit for comfortable and efficient breast pumping. And check this video: Breastfeeding 101 with Momcozy | How to Find Your Flange Size? (EN).

What is a breast pump flange?

If you've never pumped before or you simply aren't sure how the different parts of the pump work, you might be wondering: what is a flange?

In the context of a breast pump, the flange is the piece that connects your breast to the pump itself. Flanges are included with the standard breast pump, but these are "standard" size breast flanges, and they aren't necessarily going to fit every new mother correctly.

How to Measure for Right Breast Pump Flange Size?

Does the flange size actually matter?

Absolutely, the size of the flange you use is crucial to both the efficiency of milk expression and your comfort during pumping.

Flanges come in a variety of different sizes; they are not "one size fits all." While a breast pump will include flanges in the packaging, these are simply 'standard' flanges that fit the pump. They aren't intended to be custom-sized for every person who buys the pump, because every new mother will have different sized breasts, nipples, and body shapes.

Flange size matters because if the flange doesn't fit correctly, it can cause a host of negative reactions. These range from cuts or abrasions on your nipple to reduced milk flow; reduced milk flow, over time, can cause blocked milk ducts.

Here are some detailed points explaining why:

1.Efficient Milk Expression

  • The flange is the component of the breast pump that creates a vacuum seal around the areola, drawing the nipple into its funnel to facilitate milk extraction​.
  • A correct fit ensures that the vacuum suction efficiently draws milk out, whereas an incorrect size could either fail to create a proper seal or exert excessive pressure on the breast tissue.

2.Comfort and Avoidance of Pain

  • An incorrectly sized flange could lead to discomfort, nipple pain, or even damage to the breast tissue​.
  • Ensuring a good fit is critical to avoid rubbing against the nipple or pulling too much breast tissue into the flange, both of which could result in soreness or injury over time.

3.Maintaining Milk Supply

  • The right flange size can have a significant impact on your milk supply as it directly affects the effectiveness of milk extraction during pumping sessions​.
  • A flange that fits well will help maintain a consistent milk flow, which in turn supports a healthy milk supply.

4.Adaptability to Breast Changes

The size and shape of your breasts and nipples can change over time, especially during the breastfeeding journey. This may necessitate a change in flange size to continue pumping comfortably and effectively.

5.Individualized Fit

  • Every woman's body is unique. Recent findings advocate for flanges to be sized to match each nipple, considering the elasticity of nipple tissue that may cause the nipple to touch the walls of the flange during pumping.
  • Breast pump flanges come in a variety of sizes to accommodate the diversity in nipple and breast sizes among women.

6.Prevention of Blocked Milk Ducts and other Complications

  • An incorrect flange size can lead to incomplete emptying of the breast, potentially resulting in blocked milk ducts.
  • Regular and efficient milk removal is essential in preventing issues like mastitis, a painful infection of the breast tissue.

7.Enhanced Pumping Experience

  • Achieving the perfect fit enhances your comfort, making the pumping experience more pleasant and less of a chore​5​.
  • A comfortable and efficient pumping experience could also reduce the time spent pumping, which is a boon for busy new moms.

The potential negative impact of poorly fitted flanges are why it is so important to make sure your pump flanges are the right size.

Understanding and selecting the correct flange size is not just about comfort, it's a crucial aspect of ensuring a successful and satisfying breastfeeding and pumping experience. It's highly recommended to measure your nipple size, explore different flange sizes, and consult with lactation experts if necessary, to find the perfect fit for your needs.

How can you tell if the flange fits incorrectly?

You may be uncertain as to whether or not the flange is properly fitted. Here are some of the most common signs that indicate you need to get a different size flange:

  • Flange rubs against your nipple, causing discomfort or even pain
  • Significant amount of areolaor even breast tissue being sucked into the flange tunnel
  • Redness or bruising after you use thebreast pump
  • Reduced blood circulation in your breast where the flange touches your skin; this is often indicated through your skinor nipples turning lighter where the flange and skin meet
  • Feeling of fullness remaining in breastdespite pumping for the regular amount of time
  • Blocked milk ducts despite regular pumping, which indicates that you aren’t getting enough milk out

If you have experienced one or more of the above symptoms, it is very likely that the flange size for your pump is not fitted correctly.

How can you tell if the flange fits correctly?

As a general rule of thumb, if you don’t sense anything wrong and you don’t notice anything unusual after pumping, it is likely that the flange fits properly. However, to make sure, consider the following detailed signs that your flange is likely the correct fit:

  • Your nipple is "centered" inside the flange piece without touching the sides, and can move freely without being sucked inside
  • You do not have pain when using the flange
  • Your areola tissue is not inside the pump
  • There is no significant discomfort or tenderness after using the pump
  • You feel "lighter" after using the pump, without feeling like you need to pump more

How do you measure the flange size? 

If you have determined that you need a new flange, your next step should be finding out how to measure for the correct flange size. There are 2 ways to measure the size of your nipples.

1.Use the nipple ruler or the normal ruler to measure

  1. Step 1: Stimulate your nipple to make it perk up.
  2. Step 2: Hold the ruler at a perpendicular angle and line the 0 scale with your nipple base at the same horizontal line, also with the ruler edge meet your areola.
  3. Step 3: Get the millimeters number between the nipple base and the nipple top, and the size measuring is done.

2.Use the nipple ruler with holes to measure

  1. Step 1: Stimulate your nipple to make it perk up.
  2. Step 2: Place your nipple into the holes one by one to find out which one you can comfortably fit your nipples into, in a way that your nipple can be out through the hole totally, also the ruler can touch the areola at the same time.
  3. Step 3: Get the size of the holes, then the size measuring is done.

After getting the size of your nipples, you can choose the size of flanges, here are flange size guides:

Measure for Right Breast Pump Flange Size Chart

 You can get more information about size measurements here.

What are the most common flange sizes?

The “standard” flange size that comes with a standard breast pump is almost always going to measure  24mm. Flange sizes offered individually or with specialty pumps typically range from about 17mm through 27mm.

Momcozy currently offer flanges in the following sizes, with various style options for the different measurements on offer:

  • 17mm
  • 19mm
  • 21mm
  • 24mm
  • 27mm

Remember to carefully measure yourself before choosing a flange size. A properly fitted flange will make the experience of pumping not only more comfortable, but more efficient and safer as well.

Final Thoughts

The flange is one of the most important parts of a breast pump. It is important that you have a properly fitted flange in order to reduce the risk of discomfort, pain, and even serious issues like blocked milk ducts. If your flange isn’t the right size, you’ll need to measure yourself in order to determine the proper flange size for your needs.

Remember, if you are experiencing any signs that your breast pump flange isn’t the right fit, take action right away to ensure you get one that’s suited to your nipple size.

Reference link:

Frequently Asked Questions (FAQs) about Breast Pump Flange Sizing

    Why is the correct Flange Size crucial?

    • Ensures effective milk expression.
    • Prevents discomfort, pain, and potential nipple injury.
    • Reduces the risk of blocked milk ducts.

    How do I measure for the correct Flange Size?

    • Manual Measurement:
      1. Stimulate your nipple to make it perk up.
      2. Use a ruler to measure the diameter of the base of your nipple.
    • Nipple Ruler Measurement:
      1. Use a nipple ruler with holes to find a comfortable fit.
      2. Here’s a detailed guide on measuring your flange size.

    What are common signs of an incorrect Flange Fit?

    • Discomfort or pain while pumping.
    • Nipple rubbing against the sides of the flange.
    • Redness, bruising, or cuts post-pumping.

    Can my Flange Size change over time?

    • Yes, flange size can change due to factors like milk supply, nipple size change, or breast changes postpartum.

    Where can I find different Flange Sizes?

    • Various sizes are available online or from manufacturers like Momcozy offering sizes ranging from 17mm to 27mm.

    What should I do if I experience discomfort despite having the correct Flange Size?

    • Consider consulting with a lactation expert.
    • Ensure your breast pump is in good working condition.

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