What is the largest land snail someone in North America (Oregon) can own?

I thought the giant African snail would be cool, but they are illegal in the US :( What is the largest someone in Oregon can own? Where can you obtain it/them?|||Basicly go outside and attempt to find one! There are several species of land snails you can find in Oregon, but watch out, chec your DNR on which species you can collect as one might be threatened or endangered. Try this website for more info http://www.northamericanlandsnails.com/