Breastfeeding is an intimate experience between a mother and her baby, but it's not always without its challenges. For many mothers, utilizing a breast pump becomes necessary for various reasons such as returning to work, sharing feeding responsibilities, or simply maintaining milk supply. However, the effectiveness and comfort of pumping depend significantly on the correct fit of the breast pump components, particularly the breast shield or flange, which directly interacts with the nipple.
This guide will walk you through how to measure nipple for breast pump to ensure a snug, efficient fit, making your pumping journey smoother. We'll delve into why accurate nipple measurement is crucial, outline simple steps for measurement, and help you select the perfect breast shield, aiming to enhance your pumping experience with ease and confidence. If you already know your nipple measurement, see our breast pump flange size guide to compare sizes and confirm the right fit.

Why Correct Nipple Measurement is Important for Pumping
Correct nipple measurement plays a crucial role in pumping, ensuring both comfort and efficiency. Just like finding the perfect shoe size, the right fit for a pump flange can prevent discomfort and promote better milk flow. Using a flange that's too small or too large can lead to nipple pain, irritation, and potentially reduce your milk supply.
Moreover, a well-fitted flange makes the pumping experience more pleasant, encouraging consistency and ease in your pumping journey. Think of it as customizing your pumping gear for optimal performance.
So, taking the time to measure your nipples for the correct flange size isn't just about comfort; it's about making your breastfeeding journey smoother and more effective.
Steps to Measure the Nipple

Understanding why correct nipple measurement is essential for effective pumping sets the stage for learning how to measure nipple size for a breast pump, a crucial step to ensure a comfortable and efficient pumping experience.
Follow these steps to accurately measure your nipple for a breast pump:
First Method: Using a Nipple Ruler or Normal Ruler to Measure
- Stimulate Your Nipple: Gently stimulate your nipple to encourage it to become erect or perk up.
- Hold the Ruler: Hold a nipple ruler or a normal ruler perpendicular to your breast. Align the 0 scale of the ruler with the base of your nipple, ensuring that the ruler's edge meets your areola at the same horizontal line.
- Take Measurements: Determine the distance in millimeters between the base and the top of your nipple. This measurement indicates the size of your nipple.
Second Method: Using a Nipple Ruler with Holes to Measure
- Stimulate Your Nipple: Stimulate your nipple to make it erect or perk up for accurate measurement.
- Place Nipple into Holes: Insert your nipple into each hole of the nipple ruler, one by one, to find the hole that comfortably accommodates your nipple. Ensure your nipple protrudes fully through the hole, and the ruler touches your areola simultaneously.
- Measure Hole Size: The nipple should be centered; the insert hole fits snugly, yet comfortable around it. Once you've identified the hole that fits comfortably, note the size indicated on the ruler. This measurement represents the size of your nipple.

These two methods provide simple and effective ways to measure the size of your nipples, allowing you to determine the appropriate breast shield size for optimal comfort and efficiency during pumping sessions.
Now that you have your nipple measurement, use our Breast Pump Flange Size Guide to match it with the appropriate flange or insert size before choosing a pump.
Pro Tips: Nipple size may change over time--remeasure if you feel discomfort or notice a drop in milk supply.
eufy Wearable Pump Options
After measuring your nipple, choose a flange or insert that fits snugly without rubbing or pulling in too much areola. The eufy Wearable Breast Pump S1 Pro and S1 offer fitting options from 17 to 24 mm. Both combine soft silicone with HeatFlow™ warmth to support comfort during pumping.
The S1 Pro also includes a wireless charging case, making it more convenient for pumping away from home. These features can make pumping sessions easier, but selecting the correct flange or insert size remains the starting point for a comfortable fit.
I got my nipples measured by my doula and LC in the 3rd trimester and I am a 24mm L / 25mm R, which means I require a 27mm / 28mm flange. Here is my review of wearables I have tried so far in my 1.5 month journey.
eufy S1 has been the best pump so far. I have had it a few days and it has emptied me the most of all the pumps. The suction is almost as strong as my Spectra. The pump has a 30-minute cap per session and has a mode that alternates between stimulation and expression.
Pros
- Good suction and pressure
- Pump heats up
- Motor is very quiet
- Fits comfortably in bra
- Functionality is not affected by the fridge hack
- Best app functionality
- Compatible with the fridge hack
Cons
- Hard to reassemble. The seal has to close seamlessly to avoid leakage.
- Each motor is assigned to left or right, so have to make sure which one you are controlling in the app. (Minor pet peeve.)

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Conclusion
Accurate nipple measurement is fundamental for optimizing the comfort and efficiency of breast pumping. In this article, we learned how to measure nipple for breast pump and by selecting the correct breast shield size based on your size, you can ensure a comfortable and effective pumping experience, ultimately supporting your breastfeeding journey. Let's embrace this knowledge to make breast pumping a more enjoyable part of nurturing our little ones. Happy pumping!
Frequently Asked Questions
What Tools Do I Need to Measure My Nipple Size?
You'll need a ruler or measuring tape and a marker to measure your nipple size accurately.
Can I Use a Breast Shield That's Larger Than My Nipple Size?
Using a breast shield that is significantly larger than your nipple size may not provide adequate stimulation and may result in reduced milk output and discomfort. It's best to choose a shield size that closely matches your nipple measurement.
Is It Normal for Nipple Size To Change During Breastfeeding?
Yes, it's normal for nipple size to fluctuate during breastfeeding due to various factors such as milk production, hormonal changes, and baby's feeding patterns. It's essential to monitor your nipple size regularly and adjust your breast pump settings or shield size accordingly.




















