We had 8 Wondersuits for DD in 0000. She was born 5 Sept and was a tiny 2962g and wearing 00000 and some premmie clothes in other brands. They lasted her quite a while and I found 8 perfect as we often changed her 3-4 times a day (I do washing every second day). They were 'well loved' I bought around 8 again in 000. We are in WA so she was in lighter clothes during the day by mid November but still wearing the suits at night.

HTH!