Black and white and checkered all over

Where do you stand on black and white checkered floors? For a long time I thought they were tacky, but today these photos are convincing me otherwise.

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The versatility is what amazes me most. I didn't realize how it can be formal or casual, classic or modern, warm or cool. Lovely in kitchens, halls, bathrooms, dining rooms, offices and more. So bold yet so cohesive. I'm making a mental bookmark on this idea, to revisit in the future...