How Many Inches? Modus Vivendi has built an entire collection around that one burning question: How do you measure up? These jockstraps, tanga briefs, and trunks all feature an elastic waistband fashioned to look like a measuring tape. Meanwhile, an array of tank tops and T-shirts complete the look. Remember: It’s the size of your underwear collection that really matters, so make sure to stock up before these are gone for good!