Best Bet: United Bamboo Polka Dot Shirt

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Margot Tenenbaum is a constant source of style inspiration, with her scruffy fur coat and preppy polos — come Halloween, at least one girl wherever you go will be dressed up as her. But Margot's look isn't just a great costume idea, it's a quirky antidote to all of the over-the-top street style from fashion month. Channel her whimsy with this United Bamboo polka dot top. It has a vintage feel and a touch of sporty detailing at the collar.

United Bamboo polka dot shirt, $295 at La Garçonne