2 month old still in nb clothes?

She was born 8.1lbs 21 inches long. She is 2 months old now and it about 11lbs or more, she has complelely grown out of newborn pjs but still fits in the pants and onsies. 0-3 months onsies and pants are way too big! But she is in size 1 diapers. So basically the only 0-3 clothes she wears and fits in perfectly... show more She was born 8.1lbs 21 inches long. She is 2 months old now and it about 11lbs or more, she has complelely grown out of newborn pjs but still fits in the pants and onsies. 0-3 months onsies and pants are way too big! But she is in size 1 diapers.

So basically the only 0-3 clothes she wears and fits in perfectly are the pjs, everything else is nb.

Is this normal? Even some newborn onsies are too small but the majority of them fit.
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