{
  "schema_version": "compare-page.v2",
  "page_id": "breast-shield-and-flange-sizing-options",
  "url": "https://robotrunk.com/compare/want/breast-shield-and-flange-sizing-options",
  "title": "Breast shield and flange sizing options",
  "question": "How can a shopper find the right breast shield or flange size for a breast pump?",
  "answer": "No checked fact explains how to measure or choose a shield or flange size. The facts below cover which sizes or parts come with each pump. Medela Swing Maxi Hands-Free: The video shows the hands-free kit has three collection-cup parts, a lanyard, built-in rechargeable battery and USB charging, plus two breast-shield sizes. Medela Sonata Smart Double Breast Pump: The review describes a comprehensive ready-to-go kit including motor, proprietary charger, two shield sets, connectors, tubing, four bottles, tote and cooler bag. The video says the flanges are proprietary and different from other Medela pumps, but the flange detaches so aftermarket flanges can be used and standard Medela bottles fit. Willow Pump Willow Sync: Willow says Sync borrows from Willow Go with an internal donut-shaped motor, a longer smoother flange tunnel and a wide flange cone angle.",
  "kind": "breast pump",
  "market": "US",
  "generated_at": "2026-10-27T06:44:19.354Z",
  "columns": [
    "Shield sizes included",
    "Flange compatibility",
    "Flange design"
  ],
  "notices": {
    "facts": "Every value in the table is a fact RoboTrunk checked, linked to the page it came from. A dash means no checked fact fills that cell.",
    "price": "Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live."
  },
  "cited_facts": [
    {
      "ref": "p3.f8",
      "product": "Medela Sonata Smart Double Breast Pump",
      "field": "included items",
      "value": "The review describes a comprehensive ready-to-go kit including motor, proprietary charger, two shield sets, connectors, tubing, four bottles, tote and cooler bag.",
      "stated_as": "The review describes a comprehensive ready-to-go kit including motor, proprietary charger, two shield sets, connectors, tubing, four bottles, tote and cooler bag.",
      "source_type": "review",
      "source_url": "https://breastpumpguide.com/reviews/wireless-breast-pump/medela-sonata-smart",
      "source_read_at": "2026-10-24T03:36:24.138Z"
    },
    {
      "ref": "p3.f9",
      "product": "Medela Sonata Smart Double Breast Pump",
      "field": "flanges",
      "value": "The video says the flanges are proprietary and different from other Medela pumps, but the flange detaches so aftermarket flanges can be used and standard Medela bottles fit.",
      "stated_as": "The video says the flanges are proprietary and different from other Medela pumps, but the flange detaches so aftermarket flanges can be used and standard Medela bottles fit.",
      "source_type": "review",
      "source_url": "https://www.youtube.com/watch?v=EWBu7z9S0KM",
      "source_read_at": "2026-10-24T03:38:25.799Z"
    },
    {
      "ref": "p4.f2",
      "product": "Medela Swing Maxi Hands-Free",
      "field": "what is included",
      "value": "The video shows the hands-free kit has three collection-cup parts, a lanyard, built-in rechargeable battery and USB charging, plus two breast-shield sizes.",
      "stated_as": "The video shows the hands-free kit has three collection-cup parts, a lanyard, built-in rechargeable battery and USB charging, plus two breast-shield sizes.",
      "source_type": "review",
      "source_url": "https://www.youtube.com/watch?v=C-3DGxAr6yA",
      "source_read_at": "2026-10-24T03:54:29.595Z"
    },
    {
      "ref": "p7.f12",
      "product": "Willow Pump Willow Sync",
      "field": "design",
      "value": "Willow says Sync borrows from Willow Go with an internal donut-shaped motor, a longer smoother flange tunnel and a wide flange cone angle.",
      "stated_as": "an internal, donut-shaped motor; a longer, smoother flange tunnel; and a wide flange cone angle clinically proven for more milk.",
      "source_type": "guide",
      "source_url": "https://onewillow.com/blogs/all/introducing-willow-sync-pump-technology-you-love-at-a-low-out-of-pocket-cost",
      "source_read_at": "2026-10-26T00:54:52.576Z"
    }
  ],
  "rows": [
    {
      "rank": 1,
      "merchant": {
        "slug": "lovemedobaby-com",
        "display_name": "lovemedobaby.com"
      },
      "product_id": "gid://shopify/Product/6707252789382",
      "name": "Medela Swing Maxi Hands-Free",
      "url": "/products/ucp/lovemedobaby-com/6707252789382",
      "why": "The video shows the hands-free kit has three collection-cup parts, a lanyard, built-in rechargeable battery and USB charging, plus two breast-shield sizes.",
      "cells": [
        {
          "column": "Shield sizes included",
          "fact": {
            "field": "what is included",
            "value": "The video shows the hands-free kit has three collection-cup parts, a lanyard, built-in rechargeable battery and USB charging, plus two breast-shield sizes.",
            "stated_as": "The video shows the hands-free kit has three collection-cup parts, a lanyard, built-in rechargeable battery and USB charging, plus two breast-shield sizes.",
            "source_type": "review",
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            "source_read_at": "2026-10-24T03:54:29.595Z"
          }
        },
        {
          "column": "Flange compatibility",
          "fact": null
        },
        {
          "column": "Flange design",
          "fact": null
        }
      ]
    },
    {
      "rank": 2,
      "merchant": {
        "slug": "lovemedobaby-com",
        "display_name": "lovemedobaby.com"
      },
      "product_id": "gid://shopify/Product/528956489760",
      "name": "Medela Sonata Smart Double Breast Pump",
      "url": "/products/ucp/lovemedobaby-com/528956489760",
      "why": "The video says the flanges are proprietary and different from other Medela pumps, but the flange detaches so aftermarket flanges can be used and standard Medela bottles fit.",
      "cells": [
        {
          "column": "Shield sizes included",
          "fact": {
            "field": "included items",
            "value": "The review describes a comprehensive ready-to-go kit including motor, proprietary charger, two shield sets, connectors, tubing, four bottles, tote and cooler bag.",
            "stated_as": "The review describes a comprehensive ready-to-go kit including motor, proprietary charger, two shield sets, connectors, tubing, four bottles, tote and cooler bag.",
            "source_type": "review",
            "source_url": "https://breastpumpguide.com/reviews/wireless-breast-pump/medela-sonata-smart",
            "source_read_at": "2026-10-24T03:36:24.138Z"
          }
        },
        {
          "column": "Flange compatibility",
          "fact": {
            "field": "flanges",
            "value": "The video says the flanges are proprietary and different from other Medela pumps, but the flange detaches so aftermarket flanges can be used and standard Medela bottles fit.",
            "stated_as": "The video says the flanges are proprietary and different from other Medela pumps, but the flange detaches so aftermarket flanges can be used and standard Medela bottles fit.",
            "source_type": "review",
            "source_url": "https://www.youtube.com/watch?v=EWBu7z9S0KM",
            "source_read_at": "2026-10-24T03:38:25.799Z"
          }
        },
        {
          "column": "Flange design",
          "fact": null
        }
      ]
    },
    {
      "rank": 3,
      "merchant": {
        "slug": "onewillow-com",
        "display_name": "onewillow.com"
      },
      "product_id": "gid://shopify/Product/7942046318685",
      "name": "Willow Pump Willow Sync",
      "url": "/products/ucp/onewillow-com/7942046318685",
      "why": "Willow says Sync borrows from Willow Go with an internal donut-shaped motor, a longer smoother flange tunnel and a wide flange cone angle.",
      "cells": [
        {
          "column": "Shield sizes included",
          "fact": null
        },
        {
          "column": "Flange compatibility",
          "fact": null
        },
        {
          "column": "Flange design",
          "fact": {
            "field": "design",
            "value": "Willow says Sync borrows from Willow Go with an internal donut-shaped motor, a longer smoother flange tunnel and a wide flange cone angle.",
            "stated_as": "an internal, donut-shaped motor; a longer, smoother flange tunnel; and a wide flange cone angle clinically proven for more milk.",
            "source_type": "guide",
            "source_url": "https://onewillow.com/blogs/all/introducing-willow-sync-pump-technology-you-love-at-a-low-out-of-pocket-cost",
            "source_read_at": "2026-10-26T00:54:52.576Z"
          }
        }
      ]
    }
  ]
}