How to Choose the Right Breast Shield Size for Elvie Stride 2

Quick answer

To choose the right Elvie Stride 2 breast shield size, measure your nipple diameter and select a shield that is 1–2 mm larger. If you experience pain, friction, or low output, remeasure and consider trying a different size.

Getting the right breast shield size for your Elvie Stride 2 can make the difference between comfortable, efficient pumping and a frustrating session. A poor fit can lead to nipple pain, reduced milk output, and even clogged ducts. Fortunately, finding your size is a simple process you can do at home.

This guide walks you through measuring, interpreting the signs of a good fit, and knowing when to adjust. We'll also cover how accessories like Elvie Nipple Cushions can help if you're between sizes or have sensitive nipples.

Why breast shield size matters for Elvie Stride 2

The Elvie Stride 2 is designed to cater to 99% of nipples right from the box, thanks to its smart soft-silicone design. However, that doesn't mean one size works for everyone. The breast shield (also called a flange) must fit your nipple properly to create a good seal and stimulate milk flow without causing discomfort.

When the shield is too small, your nipple may rub against the tunnel, leading to soreness and reduced output. If it's too large, areola tissue can be pulled in, which can also cause pain and inefficient emptying. The right size allows your nipple to move freely without excessive friction.

• A correct fit helps maximize milk output and comfort.
• Signs of a poor fit include nipple pain, redness, or low milk volume.

How to measure your nipple for a breast shield

To measure, you'll need a ruler or a measuring tape with millimeter markings. The best time to measure is just after a pumping session or a warm shower, as your nipple is at its most elongated state. Place the ruler at the base of your nipple and measure the diameter (not including the areola). Write down the measurement in millimeters.

Most manufacturers, including Elvie, recommend adding 1–2 mm to your nipple diameter to determine the correct shield size. For example, if you measure 22 mm, you might need a 24 mm shield. If you measure 26 mm, a 28 mm shield could be the right choice. Always round up to the nearest available size if you're between sizes.

• Measure both nipples—they can be different sizes.
• If you're between sizes, start with the larger option.

Signs that your Elvie Stride 2 breast shield fits correctly

A properly fitted shield should allow your nipple to move freely within the tunnel without touching the sides. You should feel a gentle pull, not a painful tug. After pumping, your nipple should be slightly elongated but not misshapen, and it should return to its normal shape quickly.

Comfort and output are the best indicators. If you're not experiencing pain and you're getting the amount of milk you expect, your fit is likely correct. If you notice any redness, soreness, or a decrease in output, it may be time to reassess your size.

• Your nipple should not blanch or develop white spots.
• Milk should flow steadily, not just in drops.

What to do if you're between sizes or have sensitive nipples

If your measurement falls between standard sizes, or if you have sensitive nipples that need extra cushioning, consider using Elvie Nipple Cushions. These soft-silicone cushions are designed to be used inside 24 mm breast shields and come in 15 mm, 17 mm, and 19 mm sizes. They enhance fit and can improve comfort and efficiency.

The Elvie Stride 2 is designed to fit 99% of nipples out of the box, but if you need a smaller fit, these cushions can help. They are particularly useful for mamas who need a shield size smaller than 21 mm. Always ensure the cushion is placed correctly inside the shield before each pumping session.

• Use cushions as an alternative to buying new shields if you're close to a standard size.
• Check that the cushion doesn't obstruct milk flow.

Step-by-step: Finding your Elvie Stride 2 breast shield size

1. Measure your nipple diameter: Use a ruler or tape measure with mm markings. Measure at the base of your nipple after a warm shower or pumping session. Record the measurement in millimeters. Measure both nipples; they may differ.
2. Add 1–2 mm to your measurement: Add 1–2 mm to your nipple diameter to find your recommended shield size. Round up if you're between sizes. For example, a 22 mm nipple often pairs with a 24 mm shield. If unsure, choose the larger size first.
3. Check the fit during pumping: Attach the shield and pump. Your nipple should move freely without rubbing the sides. You should feel a gentle pull, not pain. After pumping, your nipple should not be misshapen or sore. If you experience pain or low output, remeasure and try a different size.
4. Consider cushions if needed: If you measure smaller than 21 mm or have sensitive nipples, try Elvie Nipple Cushions inside a 24 mm shield. They come in 15 mm, 17 mm, and 19 mm sizes to enhance fit and comfort. Cushions can be a cost-effective alternative to buying new shields.

Elvie Stride 2 accessories that can help with fit

• Elvie Stride 2: Hospital-Grade Suction Breast Pump: Smart, soft-silicone double electric breast pump (5 oz, 150 ml). Meet our first-ever electric breast pump that caters to 99% of nipples, right from the box. Help maximize your milk output with a better fit and hospital-grade suction. The Elvie Stride 2 includes a shield design that aims to fit most nipples, but you may still need to choose the right size for your unique anatomy.
• Elvie Nipple Cushions (2 pack): Soft-silicone nipple cushions to enhance fit, for improved comfort and efficiency (2 pack). Available in 15 mm, 17 mm and 19 mm. Designed to be used inside our 24 mm Breast Shields. If you measure smaller than 21 mm, these cushions let you use a 24 mm shield comfortably without needing a separate smaller shield.
• Elvie Stride Washable Parts Bundle: Includes Elvie Stride Cups (2 pack), Elvie Stride Valves (3 pack), Elvie Stride Diaphragms (2 pack) and Elvie Stride Breast Shields (2 pack). Having spare shields on hand ensures you can always use the correct size, even if one is in the wash.

Choosing the right breast shield size for your Elvie Stride 2 doesn't have to be trial and error. Measure carefully, pay attention to how your body responds, and don't hesitate to use accessories like nipple cushions for a better fit. A comfortable, efficient pumping session is within reach.