M-sized nipple for baby bottles, allowing babies to drink naturally. I purchased an additional bottle, but the nipple size doesn't match, so I'm selling it. ・Product Contents・ →From Pigeon Breastfeeding Realization Nipple - Size: M - Quantity: 1 - Target Age: 3 months and up - Nipple Type: Silicone ・Packaging・ I will package it in a plastic bag and send it with the nipple compressed! Please feel free to comment if you have any questions!