Finding the correct flange size is essential for a comfortable and effective pumping experience. Our Flange Inserts are designed to provide a better fit by reducing the standard flange opening, helping improve comfort and support efficient milk expression. Made from soft, food-grade BPA-free silicone, these inserts fit inside a 24mm breast shield and are compatible with all Sloth wearable breast pumps. Available in multiple sizes, they allow you to choose the best fit without replacing the entire flange. Features ✔ Compatible with all Sloth wearable breast pumps ✔ Fits standard 24mm flanges ✔ Soft, food-grade BPA-free silicone ✔ Comfortable and secure fit ✔ Easy to insert, remove, and clean ✔ Reusable and durable Available Sizes • 13mm • 15mm • 17mm • 19mm • 21mm Compatibility: Compatible with all Sloth wearable breast pumps. May also be compatible with other wearable breast pumps that use a standard 24mm flange. Please check your breast pump measurements before purchasing. Need help choosing the right size? Measure the diameter of your nipple (excluding the areola) after pumping and choose the closest insert size. Selecting the correct flange size can improve comfort and pumping efficiency.