I have a smaller baby, and the sweater was a touch big was it still fits! She can grow into it! I only have to do one fold on the sleeve so her hand doesn’t slip back in ha! If your baby is near the 50th percentile, you should be just fine with perfect sizing. My little one is closer to the 25th. Like I said, she can wear the sweater now, with a couple folds, but the pants are still a bit too long and wide at the waist for her, for now. I still highly suggest these outfits though. They move withSee full review