How to Measure for BabyBuddha Flange Inserts and Flanges: A Step-by-Step Guide

Getting the right flange size is the single most impactful change you can make to your pumping comfort and output. A flange that's too small causes friction, pain, and reduced milk flow. One that's too large pulls too much areolar tissue into the tunnel, leading to swelling and inefficient emptying. The good news? You don't need a specialist to measure yourself at home.

This guide walks you through a simple, four-step method to measure your nipple diameter and translate that measurement into the correct BabyBuddha flange size. We'll also explain how flange inserts can fine-tune the fit, and why a little bit of moisture and movement are normal.

Note: Use the printable measuring chart provided by BabyBuddha, or a simple ruler, for the most accurate results. Do not 'guestimate' by comparing your nipple to a coin – that is only a rough starting point.

Why Flange Fit Matters

Your nipple angle and diameter change slightly during and after weaning, and even with normal daily hydration, so checking your size every few months is a good habit. A correct flange fit means your nipple moves freely into the tunnel without rubbing the sides, and only a small amount of your areola is drawn in – typically about 2–3 mm. The right fit reduces friction, prevents blocked ducts, and helps you express more milk in less time.

The BabyBuddha pump system offers both traditional flanges (like the EasyFit Flange Kit) and flange inserts that adapt the tunnel diameter of a 24mm flange to a smaller nipple – for example, the Flange Inserts – 13mm (2-pack) for Wearable Breast Pump and 24mm Flanges. Getting this right makes a huge difference in your everyday pumping comfort.

• A too-large flange pulls areolar tissue, causing pain and reducing milk transfer.
• A too-small flange causes nipple friction and may lead to white spots or blocked ducts.

What You'll Need

A clean measurement tool – a soft measuring tape or a paper chart printed from BabyBuddha's website. A standard ruler is fine, but a measuring tape is easier to wrap gently. You'll also need a quiet moment, about 10–15 minutes after a warm shower or a breast massage, because your nipples are slightly engorged and more representative of their pumping size.

Always measure both nipples; they can be different sizes. Write each measurement down separately. Which fits looser / the larger size – use the larger measurement to determine your base flange size.

Step-by-Step Measuring Method

Step 1 – No pumping beforehand: Avoid pumping or nursing for at least 1–2 hours prior so your nipple can return to a 'resting' state – that is the size you'll pump with.

Step 2 – Measure your nipple diameter: Gently place the measuring tape or chart right at the base of the nipple, where it meets the areola. Do not compress the tissue. Record the diameter in millimeters. A typical measurement is anywhere between 17mm and 24mm.

Step 3 – Add 1–2mm for clearance: Experts (an IBCLC) generally advise adding 1–2mm to your nipple measure, not more. That extra space allows the nipple to 'draw up' and lightly touch the tunnel walls without excessive binding.

• If your nipple measures exactly 16mm, a size 17mm flange will work.
• If your measurement is 18.5mm, err on the side of a 19mm flange rather than a 17mm.

Choosing Between Flanges and Inserts

Once you have your flange size, you have two options: a flange with the proper bore size (like the EasyFit Flange Kit – 4 sizes offer to fit) or a standard 24mm flange with a silicone insert in a smaller size – like the 13mm or 19mm Flange Inserts for Wearable Breast Pump. Inserts are perfect if you are between sizes or if you want to adjust your fit without buying entirely new flanges.

For example, if you measure correctly and you see that your nipple is 17mm, you might try a 19mm flange – or you could purchase a 24mm flange and use a 19mm insert that clicks into the tunnel. Inserts also let you change sizes easily during your pumping journey, and they are silicone for comfort, so they move with you.

Pro Tips for Measuring at Home

If you happen to have a 24mm flange (the default size in most BabyBuddha kits) and you are not sure if you need an insert, you can do a simple visual test: look at the flange tunnel from above. Your nipple should move freely, not stick to the sides, and no more than 2–3mm of your areola should be pulled in when you turn the pump on. If you see your nipple pinching or folding, the size is too small; if you see a lot of aerola tissue being pulled, it's too large.

Also note that your nipples might change size later in your period or from day to day. You can always continue to use an insert size that feels comfortable, but retest every 3–4 months or if you experience the itching – and you can also use our flange measuring chart which is available in the manual guide.

• Measure both breasts from your breast pump – women usually have as much as a 2mm difference.
• It's a good idea to bring your Mrs. to an IBCLC if you are experiencing persistent pain even with correct sizing.

Getting your flange size right can feel like trial-and-error, but measuring properly takes out the guesswork. Whether you choose a one-piece flange in your exact size, or decide to use flange inserts to adapt a 24mm wearable pump flange, a hassle-free size measurement and a quick trial will make your pumping sessions noticeably more comfortable and productive. If you're ever in doubt, reach out to a lactation consultant – they can confirm your measuring technique and help you pick the right BabyBuddha parts.