Match formats vary depending on the competition being run .
They are usually run on a 4m x 4m or 5m x 5m mat , with a time limit of between 2 - 3 minutes per round .
Match formats vary depending on the competition being run , but they are usually run on a 4m x 4m or 5m x 5m mat , with a time limit of between 2 - 3 minutes per round .