Amazon with Jockey has the 3-Pack Jockey Underwear Organic Cotton Stretch 6.5" Men's Boxer Briefs (Subtle Mint/Grey Dove/Blue Chambray) for $11 with free shipping on $35+ or with Prime. Walmart with Jockey has it for the same price. 

• 3-Pack Jockey Organic Cotton Stretch 4" Men's Boxer Brief (Subtle Mint/Grey Dove/Blue Chambray) for $14