DealGenius offers this Knocker Men's Seamless Athletic Compression Boxer Briefs 6-Pack in assorted colors for $12. Coupon code "BOXER10" cuts it to $10.80. With free shipping, that's $1.80 per pair, a buck under our mention from a week ago, and the lowest total price we've seen. (It's a current low by $3.) They are one size fits all.