Measuring the size of your breast pump flange is an important step in ensuring a comfortable and efficient pumping experience. Without proper measurement, you may experience discomfort and even decreased milk output.

However, measuring your flange size can be confusing and overwhelming.

This guide will provide an easy-to-follow step-by-step process on how to accurately measure your breast pump flange size and some tips for ensuring a proper fit for maximum pumping success.

So, let’s get started!

When measuring your breast pump flange size, you will need a ruler or measuring tape and a mirror or smartphone for better visibility.

• Start by measuring the diameter of your nipple at the base, excluding the areola, while avoiding any guessing or estimation.
• It’s important to measure in millimetres for greater precision.
• Once you have your nipple measurement, add 2-4 millimetres to determine the appropriate flange size. For example, if your nipple measures 17 mm, a 19 mm or 21 mm flange would likely be the best fit.

Remember, every individual’s anatomy is different, so some trial and error might be necessary to find the most comfortable and effective fit.

If you are using a ruler to measure your breast pump flange size, follow these steps:

1. Prepare Your Supplies: Get a flat ruler and ensure you are in a comfortable, well-lit space.
2. Position the Ruler: Hold the ruler horizontally beneath your nipple, aligning it at the base where the nipple meets the areola.
3. Measure the Diameter: Look directly at the ruler and measure the diameter of your nipple across the base. Be careful to exclude any part of the areola for an accurate measurement.
4. Record the Measurement: Take note of the measurement in millimeters (mm) for the utmost precision.
5. Add 2-4 Millimeters: To determine your flange size, add 2-4 mm to your recorded nipple measurement. This extra space ensures a comfortable fit and allows for optimal pumping efficiency.

If you have a flexible measuring tape, here’s how you can measure your breast pump flange size:

1. Prepare Your Measuring Tape: Choose a soft, flexible measuring tape and find a comfortable, well-lit area. 
2. Wrap the Measuring Tape Around the Base of Your Nipple: Gently wrap the tape around the base of your nipple, where it meets the areola. Ensure the tape is snug but not compressing your nipple. 
3. Record the Circumference: Take note of the circumference measurement in millimetres (mm). 
4. Convert the Circumference to Diameter: Divide the circumference by 3.14 (π) to find the diameter. This will give you the approximate diameter of your nipple. 
5. Add 2-4 Millimeters: Add 2-4 mm to your calculated diameter to determine your flange size. For example, if your diameter is 16 mm, a 19 mm flange would be a suitable choice. 

After measuring your nipple diameter and adding 2-4 millimeters, you should have an estimated flange size. Please pay attention to how it feels during pumping to know your breast pump flange size.

• A correct flange size will allow your nipple to move freely in the tunnel without rubbing excessively against the sides.
• Additionally, you should not experience pain or pinching during the pumping process.
• Look out for signs such as redness, soreness, or insufficient milk output, which may indicate that the flange size is too small or too large.
• It’s important to test different sizes and consult with a lactation specialist if you’re unsure about the best fit for your needs.
• Comfort and milk efficiency should guide your choice of flange size.

During pumping, the nipple should be centred in the flange tunnel and should move in and out smoothly with each suction cycle. It’s normal for the nipple to elongate slightly, but it should not stretch excessively or appear flattened against the sides of the flange.

If the flange is too small, your nipple may rub against the walls of the tunnel, leading to pain, irritation, or redness. On the other hand, if the flange is too large, more of the areola may be pulled into the tunnel, potentially causing discomfort or reducing milk output. 

Measuring your breast pump flange size ensures a comfortable and successful pumping experience. Accurate measurement, proper fit, and attention to your body’s reactions are key to finding the perfect flange size.

Remember that every individual’s anatomy is unique, so don’t be afraid to try different sizes and seek guidance from a lactation specialist if needed.

Happy pumping!