Mam 2 for us she's 4 months next week x
We are on size 1 as we started off on size 0 x
Size 1, we also started from 0😊 You will know. I had the same worry but my son became frustrated at the bottle and then would stop drinking from it. He is back to normal feeding now we have moved up x
Also he became a bit more burpy all of a sudden and figured it was because he was pulling at the old teat size a lot x
We just moved to size 2 as he was getting frustrated with size 1 😊
My girl went on size 3 a week or so ago. She was chugging on the bottle more and getting a lot more trapped wind because she was working so hard previously xx
We moved up a teat size when he started to take a long time drinking and was getting really frustrated