How to Measure Your Nipple for a Flange Fit
By BabyBuddha Breast Pumps & Accessories – BabyBuddha | Published: 2026-10-18
Category: How-to Guides
Learn how to measure your nipple for a correct flange fit. This guide walks you through simple steps to ensure comfortable, effective pumping sessions.
Quick Answer
To measure your nipple for a flange fit, you need a ruler or measuring tape. Measure the diameter of your nipple (not the areola) in millimeters. The correct flange size should be about 2-4 mm larger than your nipple diameter to allow comfortable movement during pumping.
Why Nipple Measurement Matters
Using the wrong flange size is a common reason for discomfort and reduced milk output. A flange that is too small can cause friction and pain, while one that is too large may pull in too much areola, leading to ineffective suction. Measuring your nipple ensures you select a flange that creates a proper seal and supports efficient milk removal.
What You'll Need
You only need a few items: a flexible measuring tape or a ruler with millimeter markings, a pen and paper to note your measurement, and your nipple in a relaxed state (not stimulated). Avoid measuring after a pumping session or when your nipple is engorged, as this can skew the size.
Step-by-Step: How to Measure Your Nipple for a Flange Fit
- Prepare for Measurement: Wait until your nipple is in a neutral, non-erect state. Ideally measure before a pumping session or at least an hour after the last one. Clean and dry your nipple to avoid any slippage. Common mistake: measuring after pumping or when nipples are stimulated can give a larger reading, leading to an oversized flange.
- Measure the Diameter: Using a ruler or measuring tape, measure across the widest part of your nipple from one side to the other. Record the measurement in millimeters. If using inches, multiply by 25.4 to convert to mm. Checkpoint: measure twice to confirm accuracy. Even a 1 mm difference can affect comfort and suction.
- Choose Your Flange Size: Add 2-4 mm to your nipple diameter to get the recommended flange size. For example, if your nipple measures 20 mm, a 22-24 mm flange is a good starting point. Many brands, including BabyBuddha, offer flanges in standard sizes like 24 mm. If your measurement falls between sizes, try the smaller size first with an insert to fine-tune the fit.
Products That Help with Fit
- EasyFit Flange Kit (includes 2 Flanges + 2 Backflow Protectors) (4 sizes): Our EasyFit Flange Kit includes 2 Flanges and 2 Backflow Protectors with duckbill valves and silicone diaphragms. The flange is a funnel-shaped plastic or silicone piece that fits directly over your nipple to form a seal around your areola. Having a kit with multiple sizes or inserts lets you test different fits without buying separate flanges, saving time and money.
- Flange Inserts – 15mm (2-pack) for Wearable Breast Pump and 24mm Flanges: Our 15mm Flange Inserts are designed to help moms achieve proper alignment, improved comfort, and optimized milk expression when using their BabyBuddha pumps. If your nipple measures smaller than the smallest flange size available, inserts allow you to adjust the fit without replacing the entire flange.
