Features: Breast Pump Flange Measuring Tool for Nipple: This breast pump nipple measuring tool helps measure the nipple diameter to find the proper size pump flange that works effectively with your breastfeeding pump, helping solve common breastfeeding challenges. Wide Range of Sizes: The nipple measuring card includes 21 size circles to accommodate various diameter requirements, ensuring accuracy even if nipple size changes over time. High-Quality Material: Made from food-grade silicone, this measuring tool is skin-friendly, features precise measurement markings, and is safe for sensitive skin. Supports Breast Milk Production: By helping you determine the correct nipple diameter and flange size, this tool promotes better breast milk flow and output when using the right fit. Easy to Use: Simply hold the ruler against the edge of your nipple, use a mirror to read the corresponding measurement, and record the size. It fits comfortably without pressure for accurate results. Specifications: Product Dimensions: As shown in pictures Material: Silicone Color Options: Green, Pink, Purple, Light Green, Sky Blue, Light Brown, Green with soft ruler, Pink with soft ruler, Purple with soft ruler, Light Green with soft ruler, Sky Blue with soft ruler, Light Brown with soft ruler Package Includes: 1 x Silicone Nipple Ruler Note: Please allow 1–2 cm variation due to manual measurement. Due to differences in monitor displays, the actual color may vary slightly from the image.