We used with my 17 month old 0.5 and 1 we have a glow egg in his room so we go buy that to decide what to dress him in and and we will do the same when we have our other little boy x
I think we will have a 0.5-2.5 range ready to use but will most likely (try) a swaddle for the first month as the bags don’t always fit a newborn well and they can wriggle down in to the bag 🙂
It's hard in June as the weather is so variable! I think the majority of mine will be 2.5 tog, as I should be able to keep the room between 16 and 20°c. I will have a couple of 1 togs though, just in case we have a heat wave!