Nipple Shield Sizing: How to Choose Between 17mm, 24mm, and 27mm

Quick answer

To choose the right nipple shield size, measure the diameter of your nipple at its base (not the areola) while your nipple is erect. If the measurement is 17mm or less, choose a 17mm shield; 18-24mm, choose a 24mm shield; 25mm or more, choose a 27mm shield. When in doubt, start with a larger size and adjust based on fit and comfort.

If you're considering nipple shields, one of the most important decisions is choosing the right size. A shield that's too small can cause nipple compression and pain, while one that's too large may not create enough suction for effective latch. This guide walks you through how to measure for nipple shields and explains the differences between 17mm, 24mm, and 27mm sizes.

Nipple shields are not one-size-fits-all. The correct size depends on your unique anatomy and your baby's latch. Getting it right can make breastfeeding more comfortable and help ensure your baby gets enough milk. Let's break down the sizing process and give you clear decision rules.

How to Measure for Nipple Shields

Measuring your nipple is the first step to finding the right shield size. Use a soft measuring tape or a ruler with millimeter markings. Measure the diameter of your nipple at its base, where it meets the areola, while your nipple is erect. This is the most accurate measurement because it reflects the size during feeding.

If you measure between sizes, consider your baby's mouth size and latch. A slightly larger shield may be more comfortable if your baby has a wide latch, while a smaller shield may work better for a shallow latch. Always check the fit once you start using the shield.

• Measure when your nipple is erect, not when it's flat or cold.
• Measure the base of the nipple, not the areola.
• If you're between sizes, try the larger size first to avoid compression.

Understanding Nipple Shield Sizes

Nipple shields come in various sizes, but 17mm, 24mm, and 27mm are the most common. A 17mm shield is designed for smaller nipples, typically for mothers with a nipple diameter of 17mm or less. A 24mm shield fits average-size nipples, while a 27mm shield is for larger nipples.

The right size ensures that the shield fits snugly but not tightly. It should not slide around or cause pain. If you experience discomfort or notice that your baby struggles to latch, the size may be incorrect.

• 17mm: for nipples up to 17mm in diameter
• 24mm: for nipples between 18mm and 24mm
• 27mm: for nipples 25mm or larger

Signs Your Nipple Shield Is the Wrong Size

If your nipple shield is too small, you may feel pinching or see a compression ring on your nipple after feeding. Your baby may also have difficulty staying latched or may seem frustrated. On the other hand, if the shield is too large, it may not stay in place, and your baby may not be able to create a good seal.

Other signs of a poor fit include nipple pain, cracks, or reduced milk transfer. If you notice any of these, re-measure and try a different size. It's also helpful to consult a lactation consultant for personalized guidance.

• Pinching or compression marks indicate a too-small shield.
• Sliding or poor suction indicates a too-large shield.
• If in doubt, consult a lactation consultant.

Decision Rules for Nipple Shield Sizing

• Measure first, always: Measure your nipple diameter at the base while erect. Use a soft tape measure. This is the only reliable way to determine your starting size. Never guess your size; always measure.
• When in doubt, size up: If you're between sizes or unsure, choose the larger size. A shield that's slightly too large is less likely to cause compression and pain than one that's too small. A larger shield is safer than a smaller one.
• Test and adjust: Use the shield for a few feeds and watch for signs of poor fit: pinching, sliding, or your baby's frustration. If any occur, try a different size. Fit is a process, not a one-time decision.

Product Facts

• Shield Maiden Nipple Shields: Made of laboratory-tested, food-grade silicone that has a velvety skin-texture on the side used by your nursing baby, and is smooth on mama’s side so it adheres well. Are colorful at room temperature so they can be easily found, and neutral at body temperature for a more natural experience. Includes (2) Nipple Shields and a carrying case or (3) shields with one of each size for the... The velvety texture on the baby's side may help your baby latch more comfortably, while the smooth side adheres well to your skin. The color-change feature makes it easy to spot the shield when you need it, and the option to get one of each size lets you experiment to find your perfect fit.

  

• The Ultimate Gift Bundle: Whether you're looking for a gift for you (we love a 'to me, from me' moment) OR an expecting mom in your life, this bundle will free you up to go where you want, when you want, without compromise - for 20 hours at a time! The OG+ takes it to the next level with 24 hours of chilling for 28 ounces, 2 chilling options: use ice OR freeze the Inner Chamber beforehand, portable bottle warming, and compatibility with... If you're pumping and storing breast milk, a reliable chilling solution is just as important as a good nipple shield. This bundle gives you the flexibility to store milk safely for hours, whether you're at work or on the go, so you can focus on feeding your baby comfortably.

Fit Guidance

Best for

• Mothers with nipple diameter of 17mm or less who need a compact, comfortable shield.
• Mothers who want a shield with a velvety texture for baby's comfort and a smooth side for secure adhesion.

Not for

• Mothers with larger nipples who may need a 24mm or 27mm shield to avoid compression.
• Mothers who prefer a shield that changes color at body temperature; consider a standard silicone shield instead.

Choosing the right nipple shield size is a simple but crucial step for comfortable breastfeeding. Measure your nipple, consider your baby's latch, and don't hesitate to try different sizes. With the right fit, nipple shields can make a world of difference in your nursing experience.