Nipple Measuring Card - Find Your Perfect Breast Pump Flange Size

Stop Painful Pumping—Find Your Perfect Flange Size in 60 Seconds

The Problem: You're using the standard 24mm flange that came with your pump, but pumping is painful, your nipples are swollen and rubbed raw, and you're not getting much milk. The wrong flange size causes discomfort, reduces milk output, and can damage your nipples—but most women don't realize they need a different size.

The Solution: Tiny Bloom Nipple Measuring Card helps you find your correct flange size in 60 seconds. Most women need a smaller flange than the standard 24mm—using the right size eliminates pain, increases milk output, and makes pumping comfortable and efficient.

Why Correct Flange Size Matters

• Wrong Size Causes Pain & Damage: Too large and your nipple rubs against the tunnel, causing friction, swelling, and damage. Too small and your nipple is compressed, causing pain and blocked ducts.
• Reduces Milk Output: Incorrect flange size can reduce milk expression by 30-50% or double the time needed to pump the same amount.
• Most Women Need Smaller Than Standard: The standard 24mm flange that comes with most pumps is too large for 60-70% of women. Many need 17-21mm flanges.
• Nipples Can Be Different Sizes: Your left and right nipples may require different flange sizes—measuring both ensures optimal fit.
• Size Can Change: Nipple size can change throughout your pumping journey due to swelling, hormones, or time of day.

Why Parents Rate This 5.0 Stars

• 12 Size Circles (12-24mm Range): Comprehensive sizing from 12mm to 24mm in 1mm increments. Accommodates virtually all nipple sizes.
• Easy 60-Second Measurement: Simply place nipple in the smallest circle that fits comfortably. No complicated calculations or guesswork.
• Two Measurement Methods: Use circle method for quick sizing or included tape measure for precise millimeter measurement.
• Food-Grade Silicone Construction: 100% BPA-free, safe to use against skin. Soft, flexible material won't scratch or irritate.
• Clear Sizing Instructions Included: Step-by-step guide shows exactly how to measure and which flange size to choose based on your measurement.
• Reusable & Durable: Measure as many times as needed throughout your pumping journey as nipple size changes.
• Compact & Portable: Small enough to keep in your pump bag for re-measuring when needed.
• Works With All Pump Brands: Universal sizing applies to all breast pump brands—Tiny Bloom, Medela, Spectra, Elvie, and more.

Real Results from Pumping Mums

Rated 5.0/5 stars. "Really happy with my purchase! Thank you!" says Bailey.

How to Use the Measuring Card

Method 1: Circle Measurement (Recommended)

1. Measure 1-2 hours after pumping or breastfeeding when nipples are not swollen
2. Measure both nipples (they may be different sizes)
3. Place nipple in the smallest circle that fits comfortably without forcing
4. Use a phone camera or mirror to help see the fit
5. Note the millimeter size of the circle that fits
6. Choose a flange insert 1-2mm larger than your measurement (e.g., if you measure 16mm, choose 17-18mm flange)

Method 2: Tape Measure

1. Stimulate nipple to make it erect
2. Hold tape measure perpendicular to nipple
3. Line up 0 scale with nipple base at areola edge
4. Measure from nipple base to nipple tip in millimeters
5. Choose a flange insert 1-2mm larger than your measurement

Signs You're Using the Wrong Flange Size

Flange Too Large:

• Nipple and part of areola pulled into tunnel
• Nipple rubbing against tunnel sides
• Pain, friction, or chafing during pumping
• Nipple swelling or redness after pumping
• Low milk output despite good supply

Flange Too Small:

• Nipple compressed or squeezed
• White ring around nipple base after pumping
• Pain or pinching sensation
• Blocked ducts or mastitis
• Reduced milk flow

Correct Flange Size:

• Nipple moves freely in tunnel without rubbing
• Only nipple (not areola) pulled into tunnel
• No pain, pinching, or friction
• No swelling or discoloration after pumping
• Efficient milk expression

Perfect For

• New Pumpers: Find the right size from the start to avoid pain and maximize output
• Painful Pumping: Identify if wrong flange size is causing discomfort
• Low Milk Output: Correct flange size can increase milk expression by 30-50%
• Nipple Damage: Eliminate rubbing and friction that damages nipples
• Exclusive Pumpers: Essential for comfortable, efficient pumping multiple times daily
• Returning to Work: Ensure comfortable pumping sessions during work breaks
• Multiple Pump Users: Determine correct flange size for each pump brand you use

What's Included

• 1x Silicone nipple measuring card with 12 size circles (12-24mm)
• Integrated tape measure for precise measurement
• Sizing instructions
• Available in Blue, Brown, Olive, Purple, Green

Technical Specifications

• Size Range: 12mm to 24mm in 1mm increments (12 sizes total)
• Material: Food-grade silicone, 100% BPA-free
• Measurement Methods: Circle sizing + tape measure
• Dimensions: Compact card format
• Weight: 100g (lightweight and portable)
• Compatibility: Works with all breast pump brands
• Durability: Reusable throughout pumping journey
• Colors Available: Blue, Brown, Olive, Purple, Green

Sizing Guide

• If nipple measures 12-13mm → Choose 13-15mm flange
• If nipple measures 14-15mm → Choose 15-17mm flange
• If nipple measures 16-17mm → Choose 17-19mm flange
• If nipple measures 18-19mm → Choose 19-21mm flange
• If nipple measures 20-21mm → Choose 21-23mm flange
• If nipple measures 22-23mm → Choose 23-25mm flange
• If nipple measures 24mm+ → Choose 25-27mm flange

Tips for Accurate Measurement

• Measure when nipples are not swollen (1-2 hours after pumping/feeding)
• Measure both nipples—they're often different sizes
• Re-measure if pumping becomes uncomfortable (size can change)
• Use a mirror or phone camera to see the fit clearly
• Choose the smallest circle that fits comfortably without forcing
• When in doubt, size up 1-2mm for comfort

Important Information

• Non-Returnable: Due to the personal nature of this product, it cannot be exchanged once opened
• Flange Inserts Sold Separately: This card helps you determine size; purchase correct flange inserts separately
• Consult Lactation Consultant: If experiencing persistent pain or low output, seek professional support

Backed by Tiny Bloom

• Food-grade, BPA-free silicone
• 12 size options for accurate fitting
• Reusable and durable
• Works with all pump brands
• International shipping available

Ready to pump comfortably and efficiently? Join pumping mums worldwide who've eliminated pain and increased milk output by finding their perfect flange size.

Delivery:

NZ delivery - will be delivered by NZ Post for delivery within NZ for shipping within 1-3 days depending on where you live.  WE DO NOT CHARGE EXTRA FOR RURAL DELIVERY.

AUS delivery - We use NZ Courier Direct from NZ to Australia and that links in with AUS Post.  Delivery is between 4-10 days.  It is more expensive but we have chosen to absorb some of that cost for you so you can get your parcels sooner.

World Wide - Please allow 5 and up to 10 days for your order to arrive.  

Please check we may have to put a "pre-order date" on a product of when we expect it to us, if it is not currently in our stock room. We will clearly have this date next to the product when you add to basket. We can often send earlier than the "pre order date". If shipping to us is held up we will let you know via email of the delay.

Have questions? Check our FAQ for quick answers.