Amazon offers the Gold Toe Men's Cotton Crew Athletic Socks 12-Pack in White/Black for $11.99. With free shipping, that's the lowest per-unit price we've seen and the best deal we could find for this quantity by $18. They fit shoe sizes 10 to 13.

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Note: Although the product headline says 6-pack, the product details further down the page notes that a 6-pack of each color is included.