what size clothing?

Everyone keeps saying I'm going to have a small baby, I'm currently 30 weeks and baby is in the 67th percentile so just about average like she has been the whole time, but I can't decide weither to get her a premmie size outfit or get them all in newborn, I'm not worried about her being bigger than a newborn size haha I know she won't be that big 😂😂 but how different is the sizing between newborn and premmie? Can a normal size newborn fit premmie clothes or is the baby to big for them?