DealGenius offers the Knocker Men's Seamless Athletic Compression Boxer Briefs 6-Pack in assorted colors for $12. Coupon code "FALL10" lowers it to $10.80. With free shipping, that's $1.80 per pair, $2 under our July mention, and the lowest total price we could find by $3. (Many third-party sellers charge $16 or more for similar sets.) One size fits all.