They look great and I want to get some!!

But most of the colours are sold out in medium

Was thinking about trying large. Can someone tell me what the sizing is like? Same as magicalls or smaller?? She is 11 months and a bit over 9kg. She wears the medium magicalls with one snap spare in the middle. Would large petites be too big?

I just saw a pic of a 9 wk old baby on FB in the medium petites only done up on the second snap!! So, that's why I'm thinking maybe large would be ok. Opinions?