She could be full grown - most coastals, generally speaking, the males will get larger than the females. Pure coastals of some regions can get up to 10 ft in length, but it is quite rare, and these bloodlines are rarely introduced (were) into the US. I would suspect her to stay between 6 and 7 ft. You can move her up to a 4x2x2 for optimal size, but most keepers rely on 3x2x2 for their adult carpets, including myself.
Cheers
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