Flange Size Calculator

Author Bio

Idris Ya’u

BSc Botany, MSc Biology

FAQs about Breast Pump Flange Size Calculator

1. What is a flange in a breast pump?

A flange (or breast shield) is the funnel-like part that fits over your nipple and areola, allowing the breast pump to create suction and draw out milk comfortably.

2. Why is flange size important when using a breast pump?

The correct flange size ensures efficient milk removal, prevents nipple pain, and reduces the risk of blocked ducts or tissue damage.

3. How does the flange size calculator work?

It takes your nipple diameter in millimeters or inches and recommends a flange size, usually 2–4 mm larger, to ensure a proper fit and comfort.

4. How do I measure my nipple diameter?

Use a ruler or digital caliper to measure the width of your nipple (not including the areola) before pumping. Measure across the base of the nipple at rest.

5. Should I measure before or after pumping?

Measure before pumping, when your nipples are not swollen. Pumping can distort the natural size and lead to inaccurate sizing.

6. What if my flange size falls between standard sizes?

Try both sizes to see which is more comfortable. Some brands offer half sizes or custom inserts for in-between measurements.

7. Can the wrong flange size affect my milk supply?

Yes. A flange that’s too small can compress milk ducts; too large can cause improper suction. Either case may reduce supply or cause discomfort.

8. Are flange sizes the same across different pump brands?

Not always. Sizing may vary slightly. Always check the manufacturer’s chart or consult with a lactation consultant if unsure.

9. Do I need a different flange size for each breast?

Possibly. It’s normal for one breast to have a slightly different nipple size, and using the correct flange for each side is important.

10. Where can I get help with flange fitting?

A certified lactation consultant can evaluate your flange fit, suggest appropriate sizes, and help you adjust your pumping setup for comfort and efficiency.

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Flange Size Calculator