Full disclosure: I learned what I'm about to say from the much-maligned Mr. Flusser. Â (See Dressing the Man, p 62 ff.) Pattern mixing is a subtle art, mastery of which denotes one a sartorial expert. Â The general rules are these: when the patterns are of the same type (e.g., all stripes), make sure the dimensions are different (e.g., narrow, wide, wider). Â When the patterns are different (e.g., stripe, check, herringbone) make sure the dimensions are the same. These rules came as a revelation to me. Â When I first tried putting them into practice, I was astonished to see how well they worked. Â (And incidentally, the very same principles are visible in many of the Laurence Fellows fashion plates from the '30's. Â I wonder if they may have been Flusser's source.) So, in short, there is no reason to shy away from pattern mixing. Â Au contraire. Â Rely on your eye, guided by the above rules. Â You may find, as I did, that the results breathe new life into your wardrobe.