Find Your Flange Size
with a ruler app on your phone
- Download "Ruler 2.0" for iOS or "Millimeter" for Android phones.
- In iOS app settings, set measurement to “mm”. For Android, select default calibration.
- Stimulate nipple to perk it up
- Place phone screen perpendicular to nipple. (Figure 1)
- Nipple base should line up with the zero points in the corner of app screen (Figure 2)
- Slide measurement bar on screen to opposite nipple base - that’s your nipple measurement. (Figure 3)
- Use a flange that’s 2-4 mm larger than your nipple measurement. (Figure 4)
Your flange size is based on your nipple measurement in millimeters. Use an app ruler for easy and accurate sizing

FRONTAL VIEW
Hold phone
perpendicular to nipple.

TOP DOWN VIEW
Use your finger to slide the ruler line to measure nipple.
Flange Size Chart 4
Find the right flange sized based on
your measurements.