helix pomatia common name roman snail family helicidae origin southern and central europe adult size 3 to 7cm (1.1 to 2.7 inch) temperature 15 to 24°C (59 to 75.2°F) humidity 70-90% variation (1-5) 2 extinction (1-5) 1 (least concern) legality legal everywhere !! life expectancy up to 20 years and even more potentially !! (theres a snail out there older than me woa)