The Baby Bliss Nipple Ruler and tape measure is a must-have tool for accurately determining your nipple size. It has a circular measuring option for precise nipple diameter measurement, and a straight ruler for dual assessment. Made from 100% pharmaceutical-grade silicone. Keep it clean by washing with warm soapy water and using an alcohol wipe for sanitization. Say goodbye to guesswork and get the perfect fit with the Baby Bliss Nipple Ruler. Please note, personal items such as this are non-returnable.