Buying baby clothes.

Adri • 8-24-11👦6/23/13👩6/28👼 5/10/19🤱

Kohls has a really good baby sale going on plus 30% off with a kohls card. I was wondering since both of my other 2 kids were big my son 9lbs 3 oz and my daughter 7lbs 13oz. Would 6 months clothing be good for the fall? Or should. I just get 9 months.