[A must-have good helper for new mothers]New mothers may be confused when choosing the perfect -resistant breast pump flange or shield. Now, our soft silicone nipple ruler can perfectly solve these troubles and help you quickly determine the suitable breast pump flange.[Appropriate Size]Nipple ruler for new mothers can help you find a comfortable breast pump flange or shield size, avoid when pumping, new mothers can really enjoy the process of breastfeeding, and let the baby grow up healthily.[How to use] align the hole of our silicone measuring ruler with the , choose a hole that fits comfortably without force. It is recommended to measure and adjust the flange dimensions on a regular basis.[Safe Material]Our ruler is made of food-grade silicone material, soft and kind, no irritating smell, no burrs, and will not scratch the skin. Durable and easy to clean.[Package Included]4 Pack Soft Silicone Nipple Measures (Purple) with extra 60 inch flange ruler.Colour:PurpleMaterial:Silica gelSize:18x10cmPackage Contents:4 * measuring ruler4 * Flange rulerOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.