Now this is a look one shouldn't take lightly. It's serious, slightly retro, no-flaws-allowed trend that only a few can pull off. Not that we're promoting stick-thin legs here, but skinny jeans, well, are better on skinny legs—long, skinny legs. We like them paired with sky-high heels—the better to elongate—but flats work too, for a more casual vibe. Either way, remember: These jeans don't leave much to the imagination, so wear with caution. —Karen Johnston