What even are babies clothing sizes ๐Ÿ˜‚๐Ÿ˜‚

Alysha

Heโ€™s 8 pounds and 20 inches long and this is a newborn size onesie. Even some premie clothes are too big. Like. Iโ€™m so confused on what baby has this long of arms as a newborn. Iโ€™m actually choking about how funny this is to me ๐Ÿ˜‚