As per NASA, the size of the Antarctic's ozone hole has not changed in one year. Last year, the size of the hole at peak was 9.3 million square miles. On September 11, 2014, the size was found to be the same.

The largest hole was recorded September 9, 2011, which was at 11.5 millions square miles. In comparison to the level it was between 1998 and 2006, the size of ozone hole has reduced. But it is similar to the size it was in 2010,
2012, and 2013.

During the 1980s the ozone hole was formed due to the alarming rise in atmospheric chlorine levels. The ozone layer is important for us as it protects from harmful ultraviolet radiation, which can lead to skin cancer and severely damages plant life.

In 1987, the Montreal Protocol was passed with an aim to reduce the chlorofluorocarbons and bromine-containing halons. "The ozone hole area is smaller than what we saw in the late-1990s and early 2000s, and we know that chlorine levels are decreasing", said Paul A. Newman, chief scientist for atmospheres at NASA's Goddard Space Flight Center in Greenbelt, Maryland.

Newman further asserted that for now it is not known that whether or not a long-term Antarctic stratospheric temperature warming would reduce the ozone depletion. It's been more than 10 years now that researchers have been studying the ozone hole to know its trend.

Bryan Johnson from NOAA's Earth System Research Laboratory affirmed that 9.3 million square miles might look big enough. But in reality, it is the smallest that scientists have seen in quite some time. Bryan asserted that their measurements have been showing less thinning of the ozone over the South Pole during the past three years. Further studies will help know the reasons behind change in the ozone hole size.