Giant African land snails are illegal in the US and some other countries due to their potential as a devastating invasive species. While they are legal pets in some countries, under no circumstances should they be kept as pets where illegal to do so, and they should also never be released into the wild. They are also prolific breeders so if you have more than one you also need to be extremely careful about disposing of the numerous eggs produced.The smaller of these snails (Achatina fulica) grow to be about 3-4 inches long (shell length), while the larger ones (Achatina achatina) can have a shell up to 10-11 inches long (in a snail this size the body stretched out would be about 14-15 inches!).