I've been noticing a trend in the design world these days that's surprisingly unusual: triangle, pinwheel, and pennant patterns! From Matthew Williamson's multicolor Bustier Cocktail Dress to Ikea's gray Stockholm Rug ($249) to Ferm Living's Remix Pillow ($100), triangle patterns are everywhere! My favorite is the wedding invitation design (top left) by San Francisco-based graphic designer Erin Butner, which features multicolor facets and a festive pennant. Ferm Living's blue and white Remix Wallpaper ($110) would look stellar with indigo Bookhou's Triangle Pillow ($45) too, don't you agree? To shop the rest of the trend, just click on each of the product images!