My three week old already grew out of newborn size and a lot of the 0-3 size onesies. She is so long that some of the 0-3 size onesies are too short and also she is a lot fatter. I noticed some of the 3 month sizes fit her pretty good and some of them are still a little big. I assume there are some variations of size in garments amongst one size. No idea how much she has gained so far since we left the hospital. She was 8lb 3 oz at birth and then when we left the hospital she was 7 lb 5.5 oz. Has anyone had this experience with clothes so far?
Re: Three week old wearing 3 month size clothing?
It happens all the time. Baby clothes aren't one size fits all newborns. Just dress her in whatever size she is most comfortable in.
FWIW, when my son was 9 months, he had just graduated to 18 month clothing.