Macy's offers the Pair of Thieves Men's Crew Socks 3-Pair Pack in Black for $4.96. Pad your order with a beauty item (they start at $3) to bag free shipping; otherwise, shipping adds $10.95. That's $2 under our October mention and the lowest price we've seen. (Excluding padding, it's the best deal now by $8.) They're available in one size fits most.
Reviewing this critical insurance policy takes a little effort, but it pays off big.