Thank you for viewing! This is a Medela nipple shield, a set of two. I only used these for the first month after my child was born. I'm passing them on to someone else. Size: 24mm Follow-up discount available! Immediate purchase is welcome! I also have baby clothes, kids' clothes, and childcare items for sale! If you purchase multiple items, I can offer a further discount♪ Please comment or send a combined purchase request if you'd like. ( ⁎ᵕᴗᵕ⁎ )❤︎ ↓ Please take a look here. #Aki'sChildcareGoods Thank you.