Willow Breast Pump Sizing Insert Set - Smaller Flange Fit | Willow – Willow Pump
Willow Sizing Insert Set (2-pack)
Regular price $19.99 $10.99
Find your flange fit. Pump with confidence.
When it comes to wearables, sizing is different — you'll need a fit that's more snug. Most moms find that adding 1-3mm to their nipple size (or 0-2mm if you're pumping with Willow 360) results in optimal output and comfort.
Still need your nipple measurements? Try our sizing guide
| Measured Nipple Size | Willow Recommended Size Flange / Insert |
|---|---|
| 9-11mm | 13mm insert in 24mm flange |
| 12-13mm | 15mm insert in 24mm flange |
| 14-15mm | 17mm insert in 24mm flange |
| 16-17mm | 19mm insert in 24mm flange |
| 18-20mm | 21mm flange |
| 21-23mm | 24mm flange |
| 24-26mm | 27mm flange |
Sizing inserts can only be used with a 24mm flange or 24mm container insert.
Questions? Our experts can help.
Call: 1-888-WILLOW-3
How To Find Your Nipple Size
Step 1: Get a measuring tape
Step 2: measure the diameter of your nipple at its base while erect to determine its size accurately.
Step 3: consider sizing up
Most moms find that adding 1-3mm to their nipple size results in optimal output and comfort.
Step 4: take a look at our chart
Match your measurements to our sizing chart to find your recommended size flange / insert.
What to know
- Fit into our 24 mm flanges to improve comfort and output for moms who measure 21 mm or smaller and up to 27 mm
- Flexible silicone material provides a snug, secure fit
- Compatible with Willow 360, Willow Go, and Willow Wave flanges
- Dishwasher safe for easy clean-up
- Made without BPA for a safer pumping experience
Use the Willow Size Guide to measure nipples and find the insert size that's right for you.
Please note sizing inserts fit into 24mm flanges or containers only.
What’s included
2 Sizing Inserts
Customer reviews
Replacing Your Parts
For optimal output, replace every 90 days (or when you notice discomfort or signs of wear).