We bought Indie's big girl car seat before she was even born. It's suitable from 9kg+ and she weighs over that, but I still don't think she is big enough for it to fully support her. In the mean time, she loves getting in it and me strapping her in.
It wasn't until the other day I put her in it and took a photo and looked back on the last time I did, and realised how much she has changed!
5 months old 14 months old