Finding the right flange size is the secret to painless pumping, but the tool you use matters. Our Breasties Silicone Nipple Ruler replaces outdated paper guides with a flexible, food-safe solution designed for accuracy and comfort.

• Skin-Safe Material: Crafted from 100% food-grade silicone—soft, flexible, and free of rough edges.

• Accurate Sizing: Clear, easy-to-read increments to help you choose the correct breast shield size instantly.

• Better than Paper: Durable and bendable; it won't snap, crease, or cut your skin like cardboard alternatives.

• Pumping Essential: Use it to prevent nipple trauma and ensure your wearable pumps are performing at their peak.

Our nipple ruler is also included in every set of Breasties.

Instructions on how to use your nipple ruler are here.