It depends on the size of the baby whether she would fit ino the grobag, i think they say 8.1kg for the 6-18month size. DS is almost 5 months old and fits into this size but he is a huge baby. I got a sleeping bag from pumpkin patch which was about 30ish dollars that ds is sleeping in at the moment and we will get a grobag soon. I have seen them in target and also myer aswell so you can get cheaper versions.

We are currently putting ds in the sleeping bag then wrapping him over the top of it to keep his hands under control which is working really well for us as he is toasty warm and still wrapped. For a few nights i stopped using the sleeping bag but he was waking up several times in the night coz he was cold but last night i put him in the sleeping bag again and he slept 7-7 for the first time. Not sure if it had anything to do with it but i think he was getting cold and that is why he was waking so much.

Im going to have to wean ds off the wrap soon but to be honest im scared to do it as a few times when he has got his arms out he has woken himself up even though i dont think he has the startle reflex anymore.