Funny Mens Boxer Shorts - Fart Image. Funny Valentine's, Birthday, Christmas Gift Idea For A Man. White Funny on the bum printed boxer shorts for men. Material: 60% Polyester, 35% Cotton and 5% Spandex Elastic waistband so does stretch to fit slightly bigger. Waist Size CM Inches XS - 64cm 26 inch SMALL - 70cm 28 inch MEDIUM - 76cm 30 inch LARGE - 84cm 33 inch