Find Your Perfect Flange Fit for Comfortable & Efficient Breast Pumping

When it comes to breast pumping, using a properly sized flange makes all the difference. The right fit helps prevent nipple pain, promotes a healthy milk supply, and ensures you’re pumping efficiently. In this guide, we’ll show you how to measure your nipple diameter, determine the best flange size, and troubleshoot common fit issues—so you can pump comfortably and confidently.

Why the Right Flange Size Matters?

  • Greater Comfort

    A well-fitted flange makes pumping comfortable and eliminates pain.

  • Healthy Nipples & Breasts

    No more friction,  soreness or clogged ducts.

  • More Efficient Milk Extraction

    Proper sizing improves milk flow and can shorten pumping sessions.

  • Consistent Milk Supply

    An optimal fit leads to better breast emptying and helps maintain supply.

How to Measure Your Nipple?

Step 1

Download & Print the Idaho Jones Nipple Ruler

Use the provided button or scan the QR code to print the nipple ruler. Ensure that the document is printed at 100% scale for accuracy.

Download the Nipple Ruler

Step 2

Measure Your Nipple Size

  • Cut out the provided nipple ruler.
  • Position Piece 1 with the ruler side facing outward, aligning it with the right edge of your nipple.
  • Place Piece 2 next to the left edge of your nipple, ensuring that it runs parallel to Piece 1.
  • The number on the ruler that aligns with Piece 2 represents your nipple diameter measurement (excluding the areola).

Step 3

Choose Your Flange Size

  • Check Your Number: The ruler reading where the two pieces meet is your nipple diameter.
  • Find Your Size: Add 0–4 mm to that diameter to identify your optimal flange size. Many Idaho Jones customers add about 2 mm for the best fit.

Find the Correct Fit

  • ✅ Correct Fit

    • The nipple can move freely in the tunnel without excessive friction.
    • The areola remains outside the tunnel.
    • Comfortable suction and efficient milk expression.

  • ❌ Too Small

    • Nipple rubs against the tunnel walls.
    • Discomfort or pain during pumping.
    • Limited milk flow.

  • ❌ Too Large

    • Too much of the areola is pulled into the tunnel.
    • Reduced suction efficiency.
    • Decreased milk output.

  • ❌ Elastic Nipples

    • Nipple stretches too far into the tunnel.
    • May benefit from the Cushy Silicone Flanges which keep the nipple in place.

Get Your Perfect Fit

Finding the right flange size can make all the difference in your pumping experience. Use our sizing tool today to ensure comfort, efficiency, and a healthy milk supply.

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