[sarasi]

For Americans, it's a 4-year degree. For people in other English-speaking countries a Bachelor's degree can be finished in 3 years, so that suffices. The "4-year degree" thing tends to be emphasised so much on the internet that people from countries with 3-year BAs often worry that their degree with not suffice, when it will (I am living proof).

However it does need to be a full Bachelor's degree, not an Associate's degree, so Manji2012, I'm afraid you don't qualify for a working visa.