Try searching this forum for 'Russian tortoise enclosure' (add 'outdoor' if it is not specific enough) and see what you get.
Also, you can scroll through the enclosure section from the beginning page by page and look at threads that interest you, if you really want to be compulsive (not that I did that, of course).
Provide more information on about where you live, typical weather, how much room you have, are there predators or need to protect from family dogs, etc.?