Close your eyes. Think jeans. Now open. They were 501® Originals, right? With a classic straight leg and iconic styling, they re literally the blueprint for every pair of jeans in existence burned into the world s collective cortex ever since Levi Strauss (the man himself!) introduced them in 1873. To this day they ve never gone out of style. And they never will. Size Conversions: XS-UK 6, S-UK 8, M-UK 10, L-UK 12, XL-UK 14, XXL-UK 16.