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A classic outfit includes: A black or midnight-blue dinner jacket Matching formal trousers A white dress shirt A black bow tie Black formal shoes Dark dress socks An optional waistcoat or cummerbund A dinner jacket normally has satin or grosgrain details that distinguish it from an ordinary business suit

A summer sundress is appropriate (just make sure the fabric isn't overly formal)

Best of all, the retailer frequently has sales, so there's a good chance you'll find some options under $500 from time to time

It inspired numerous discussions about optical illusions and cognitive science, demonstrating how a simple photograph could lead to widespread fascination and debate