Rolling stoppages across University of Western Sydney campuses have started today, leaving potentially hundreds with no class to go to.

The National Tertiary Education Union has started its campaign to protest the ever-increasing class sizes at the University’s six separate sites.

There has been a one-hour stoppage at midday today.

The wave of industrial action follows the lack of success in enterprise agreement negotiations between UWS management and staff.

The university union’s UWS branch president, Jan Falloon, has told ABC reporters the needs are great enough for students to be displaced.

“It will have a minimal impact on classes,” Ms Fallon said.

“There will be some classes disrupted however we're much more concerned over the long-term impact of the situation at the university on our students.

“Those students that have been at the university for a while are aware that their class sizes are getting bigger and bigger, that it's getting far more difficult for them to access staff members.”

Reports say the action will be ongoing, with the next to occur in ten days.