Some patterns are easy to identify and differentiate. Plaid versus checkerboard? The lines – and what’s in between them – are pretty clear cut. Same with geometric combinations, florals, and stripes. They’ve all got a distinctive look you’ll pick out from a distance. Not always so with herringbone and houndstooth. Unless you’re glancing at a large-scale iteration of the latter, both fabrics are based on a twill pattern, in which an interlocking weave is created when the warp goes under and then over multiple wefts along the diagonal.