In order to create a fair playing field for all, these three nail brands made it clear that competitors could use any system or brand and would be categorised by relevant divisions pertaining to their skill and expertise. These divisions were to be kept anonymous during each competition and judging, so that each competitor, regardless of skill level, was judged exactly the same. Only after judging, were the competitors then grouped and ranked in their own and correct division. This original ethos remains the same.
This annual competition has become a Mecca for those seeking international recognition and industry accolades. The competition began with 6 categories. It has now moved up to 14 in London. Over the years some categories have been eliminated and new ones have taken their place. These have been dictated by industry and consumer emerging nail trends.
Participants have one hour to do their nails and put together the rest of their outfit to match their chosen theme. Many even build elaborate backdrops which they attach to their forearms to further emphasize their nails. In the past, there has been a huge variety of nail themes ranging from a World War I commemoration to an African safari that looks a whole lot closer to a diorama than a manicure.
According to nailympia.com and goliath.com