We know the feeling all too well — trying on dozens of jeans in a badly lit dressing room only to leave defeated and empty-handed. But why is finding the perfect pair notoriously difficult? We chatted with celebrity stylist and on-air fashion expert Cindy Conroy to dig into it. "[Jeans have] a snug fit with very little wiggle room, unlike any other piece of clothing in your wardrobe," she tells PEOPLE. "That's why it's so challenging to find an exceptional pair of jeans." The key to finding your perfect pair, though, is all about knowing your measurements, according to Conroy. "When it comes to jeans, there's a science to it — so get that measuring tape out," she explains. To find your dream pair, one should also consider the material makeup (the more elastane or spandex, the more give there will be, if that's your preference) and the style, from high-rise flares to baggy boyfriend jeans, which can fit and look diff