It depends alot on the type of carpet python as there a a few different breeds. Jungle carpet pythons(morelia spilota cheynei) will grow to anywhere between 14-18 feet in length. Coastal Carpet...
pythons can grow to be about 30 feet long.
25-30 feet long
It just grows
the longest ever was a reticulated python shot off the island of celebes. 33 feet.