There are tons to choose from really. It all depends on what your needs and personal preferences are. Indica more stoney high while reaching for a sativa variety would yield the cerebral type of high. But because you want something small you'll be using something more Indica dominant. That's good because most will flower in 9 weeks or so and be relatively short. With some pruning and LST you can really get those buggers under 2 feet.
The choices are to the hundreds so here are just a few that come to mind without knowing any preferences.
Blue Mystic
Blueberry
NY Sour Diesel
Mango
Auroa Indica
AK47 (or 48) nice stable sativa mix but flowers in 47/48 days and can be contained
Lowryder
Lowryder 2