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Flange Size Measuring Tool (US ONLY)

(16 reviews) Write a Review

It's really important that the measuring tool gets printed out accurately, so please:

  • Make sure you download the right version for your paper size (surrently, we only support LETTER SIZE (US)
  • Make sure you do not 'scale to fit' - select 'full size' or 100% in your print menu. 


  • Fold the ruler along the fold line and carefully cut out the circles.
  • Open the page back up and then place each hole around your nipple.
  • The best size will fit easily around your nipple, but be quite snug. We're after a snug fit 
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    16 Reviews Hide Reviews Show Reviews

    • 5
      Finally checked my size

      Posted by Olivia on 23rd Jan 2023

      I've been pumping for 3 months now and barely checked my size. Of course my size was much smaller than the regular pump size ones. Now that I know the correct size and bought the correct flange it makes a difference. So glad I finally measured.

    • 5

      Posted by Bethany Sanchez on 12th Jan 2023

      I love the flange inserts I ordered I have no pain when pumping and they work with both my regular pump and my hands free!!

    • 5

      Posted by Kayla Hashberger on 26th Dec 2022

      I was so thankful to find this tool on TikTok and was able to get the best fitting flange that I needed!

    • 5
      Very helpful

      Posted by Megan on 19th Dec 2022

      this was extremely helpful finding the size I needed to ensure I am using the right sizes!

    • 5
      Digital nipple ruler

      Posted by Angela Gapuz on 16th Dec 2022

      Love it and I always recommend to other moms your website.

    • 5
      Flange measuring tool

      Posted by Bobbi on 12th Dec 2022

      This helped me so much since I never knew what size I was and now I can actually get the right size flanges that I need

    • 5

      Posted by Cristian on 5th Dec 2022

      This ruler was the most accurate tool that I found. My wife is very happy that she was able to find her right size after struggling for a while, now pumping is not as hard for her.

    • 5
      Nipple ruler

      Posted by Yoselin Jimenez on 15th Nov 2022

      Great!! I was able to find my correct flange size!

    • 4

      Posted by Cassie Sullivan on 6th Oct 2022

      I still had a gard time finding my size.

    • 5
      Nipple measuring tool

      Posted by Bethany on 28th Sep 2022

      This was very helpful! I ordered the right size flange inserts for my pump after trying this and it does not hurt when I pump anymore.

    • 5
      Flange inserts

      Posted by Bailey on 24th Sep 2022

      These have been a game changer for me! I am so happy I purchased these. Making exclusively pumping much easier on me and not painful.

    • 5
      Great tool

      Posted by Emily LeQuin on 22nd Sep 2022

      This was great I had been using the wrong size flange was in so much pain while pumping I was able to find my correct size and seems to really be helping