It definitely happens with men's sizes too. "Eyewitness News bought four pairs of labeled 36-inch waist pants from different retailers and tested their measurements. Old Navy's pants measured 39 inches and H&M at 39.5 inches, while Banana Republic and The Gap both came in at 40 inches.%0D %0D Esquire Magazine's own test measured H&M's size 36-inch dress pants as 37 inches, Calvin Klein's Dylan pant as 38.5 inches, and The Gap as 39 inches. The worst offender was Old Navy, coming in an entire five inches larger at 41 inches."