How to Measure Nipple Size for More Effective and Comfortable Breast Pumping

Many breastfeeding mothers experience pain, chafing, or poor milk flow while pumping. One of the main causes of these issues is using a breast pump flange that doesn’t match their nipple size. That’s why it’s essential for every mother to understand how to measure nipple size correctly, so they can choose a flange that fits properly and ensures comfort during pumping.

Hegen introduces its full silicone breast pump flanges, available in various sizes tailored to match each mother’s unique measurements. By learning how to measure nipple size accurately, mothers can prevent discomfort and improve pumping efficiency. Here’s everything you need to know.

Why It’s Important to Know Your Nipple Size Before Choosing a Breast Pump Flange

Every mother has a different nipple size, so flange selection cannot be generalized. A flange that’s too small can cause excessive pressure on the nipple, while one that’s too large can pull too much of the areola into the tunnel. Both situations can hinder milk flow and cause pain. This is why understanding how to measure your nipple size is so important:

• Enhances comfort while pumping: A correctly sized flange keeps the nipple in an ideal position without unnecessary pressure.

• Supports the let-down reflex: The right fit helps trigger a more effective milk ejection reflex.

• Prevents chafing and swelling: Balanced pressure minimizes the risk of nipple injury and breast inflammation.

• Improves milk output: A proper fit allows smoother milk flow and helps express a greater volume.

By knowing how to measure nipple size properly, mothers can make the most of their breast pumps while maintaining breast health.

Also read: How to Use an Electric Breast Pump & Top Recommendations

When Is the Best Time to Measure Nipple Size?

Timing is key for accurate and consistent results. Below are essential tips for determining the best time to measure your nipple size:

1. After Breastfeeding or Pumping

At this time, the nipples are at their largest due to suction stimulation, providing the most accurate measurement for pumping conditions.

2. When the Body Is Relaxed and at Normal Temperature

Avoid measuring when you’re tired, stressed, or when your body feels too hot or cold, as these factors can affect nipple elasticity and size.

3. Avoid Measuring When the Breasts Are Swollen, Sore, or Chafed

Swelling can temporarily increase nipple diameter, while pain or injury can make measuring uncomfortable and inaccurate.

Also read: Complete Guide to Choosing a Breast Pump & 5 Key Factors to Consider

How to Measure Nipple Size Correctly

Knowing how to measure nipple size accurately is essential for achieving optimal and comfortable pumping results. The process is simple and can be done at home using basic tools. Here’s a step-by-step guide:

1. Prepare Your Measuring Tool

Use a ruler with millimeter markings, a small caliper, or a nipple ruler for more precise results.

2. Measure Only the Nipple, Not the Areola

Avoid including the darker area around the nipple, as this can lead to inaccurate measurements and an ill-fitting flange size.

3. Measure the Widest Part of the Nipple

This point represents the true diameter and serves as the primary reference when selecting your breast pump flange.

4. Record the Measurement in Millimeters (mm)

Keep this measurement as your nipple size reference. Add 2–4 mm to the result to allow comfortable movement during pumping.
For example, if your nipple measures 18 mm, the recommended flange size would be approximately 22 mm.

By following these steps, mothers can find a breast pump flange that fits well, soft, comfortable, and suitable for daily use.

Also read: Simple Tips for Cleaning Electric Breast Pumps

Signs That Your Breast Pump Flange Doesn’t Fit Properly

In addition to knowing how to measure nipple size, breastfeeding mothers should also recognize the signs of an ill-fitting flange. Using the wrong size can cause discomfort, reduce milk output, and even lead to nipple injury. Here are some indicators to watch for:

• Pain or chafing after pumping. This suggests the flange may be too small or too large, causing excessive friction or pressure.

• Areola gets pulled too far into the tunnel. This means the flange is too large, drawing in breast tissue beyond the nipple.

• Low milk output despite long pumping sessions. Milk flow is restricted because the flange doesn’t properly stimulate the nipple.

• Red marks, swelling, or discomfort around the breast. These are signs of uneven pressure from an ill-fitting flange.

• Unstable pump sound or weak suction. This indicates poor alignment of the flange, reducing suction effectiveness.

If you experience any of these symptoms, it’s likely that your flange size is incorrect. Re-measure your nipple using the correct method to find the most comfortable and efficient fit for optimal milk production.

Also read: Ideal Pumping Schedule & Tips to Maximize Milk Supply

Recommended Flange Sizes Based on Nipple Diameter

Hegen offers a range of full silicone breast pump flanges designed to be soft, flexible, and tailored to each mother’s measurements. Once you know your nipple size, you can refer to the guide below:

When determining the most suitable flange size, there are several important factors to consider. First, measure both nipples, as the left and right sides may differ in size, meaning you might need different flange sizes for each breast.

Second, try several flange sizes until you find the one that feels most comfortable and does not cause pain during pumping. Third, use Hegen’s soft and flexible silicone flanges, designed to provide a natural pumping sensation that closely mimics a baby’s suckling. 

By following the correct method for measuring nipple size, mothers can pump breast milk more comfortably, efficiently, and achieve optimal results with every session.

Also read: Power Pumping Technique, An Effective Strategy to Boost Milk Supply

Advantages of Hegen Breast Pump Flanges Compared to Others

The breast pump flange is one of the most crucial components in the pumping process, as its quality greatly affects both comfort and the effectiveness of milk expression. Hegen understands the needs of every breastfeeding mother who seeks safety, softness, and efficiency. Below are the key advantages that make Hegen breast pump flanges stand out from others on the market.

1. Made from 100% Full Soft Silicone

Hegen uses premium, medical-grade silicone that is exceptionally soft on the skin, flexible, and durable. Its smooth texture naturally follows the breast’s contours, reducing excessive pressure on the nipple.

This makes pumping more comfortable, even during extended sessions. The silicone is also easy to clean and resistant to deformation, ensuring consistent performance even with daily use.

2. Smart, Ergonomic Design

Hegen flanges are designed to follow the natural anatomy of a mother’s breast. The nipple remains centered in the flange, ensuring stable suction and preventing unnecessary friction.

This design promotes smoother milk flow with optimal pressure while minimizing pain during pumping. The ergonomic shape also allows mothers to pump comfortably in an upright sitting position, without the need to lean forward.

3. Free from BPA, BPS, and Other Harmful Chemicals

One of Hegen’s greatest strengths lies in its commitment to safety. The product is completely free from BPA, BPS, phthalates, and other chemicals that may disrupt hormones or pose health risks to infants.

This makes Hegen flanges safe for everyday use, even for mothers with sensitive skin. With these non-toxic materials, you can pump and store milk with complete peace of mind, free from contamination concerns.

4. Available in a Wide Range of Sizes 

Hegen offers a variety of flange sizes, each designed based on accurate nipple measurement methods. Since every mother has unique nipple shapes and sizes, this ensures a perfect and personalized fit.

A well-fitted flange not only enhances comfort but also supports a stronger let-down reflex, helping milk flow more smoothly and efficiently.

5. Compatible with Hegen’s Express-Store-Feed System

One of Hegen’s most innovative features is its Express-Store-Feed system, which allows mothers to pump directly into a storage container, seal it tightly, and then attach a teat for feeding, all without transferring the milk.

This system maintains hygiene, prevents spills, and saves time. With its versatile design, Hegen flanges are fully compatible with the entire Hegen ecosystem, including bottle caps, breast pump adapters, and storage lids.

Also read: Step-by-Step Guide to Safely Sterilize Your Breast Pump

Additional Tips for More Comfortable Pumping

Knowing how to measure your nipple size is only the first step. To achieve the best pumping experience, keep these practical tips in mind:

• Massage your breasts before pumping. This helps stimulate milk flow and prevents blockages.

• Use both stimulation and expression modes. Adjust them to your comfort when using the Hegen electric breast pump.

• Ensure all pump components are clean and properly assembled. This maintains hygiene and optimal suction performance.

• Relax your body posture. Sit comfortably and avoid pressing the flange too tightly against your breast.

• Use the correct flange size based on your measurements. Even the best pump cannot deliver optimal results if the flange size is incorrect.

By combining these tips with the proper nipple measurement method, mothers can enjoy a more efficient, comfortable, and pleasant pumping experience.

Also read: Electric vs. Manual Breast Pumping, Which Is Better?

Knowing how to measure nipple size accurately is the first step toward a more comfortable, safe, and effective pumping journey. The right breast pump flange helps maintain nipple shape, improves milk flow, and prevents soreness or injury commonly experienced by breastfeeding mothers.

Record your nipple size today and discover the most suitable Hegen breast pump flange on the Hegen Indonesia Official Website. Enjoy a soft, natural, and comfortable pumping experience with Hegen, the ultimate solution for smart, modern mothers.