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This is the dress code for some of lifes fanciest events formal weddings as groom attire, galas, balls, even the Oscars

If you dont feel your outfit is complete without heels, keep in mind that they can make walking in the sand very difficult

Going global: The hashtag #TheDress was trending worldwide on Twitter as millions weighed in on the frock Photo trickery

"If you imagine your eyes and brain are like a camera, it might set to the setting of outdoor and then it processes the visual information in one way - or it might be set to indoor and then it processes information in a different way," explains Marie Rogers, who researches cognition and colour perception at the University of Sussex

A short cocktail dress only passes at the relaxed end or at the optional rung

Length of size US 2 / AU 6 shoulder to hem: 84cm / 33in