The piece of "The Style" (which is what De Stijl means) that has struck me the most is  Gerrit Rietveld's "Red and Blue Chair". See https://s-media-cache-ak0.pinimg.com/originals/1a/8c/d3/1a8cd3ff9125f8b0ccafb82ff9e3ecdb.jpg

As a piece of sculpture representing the Platonic ideal of "chair", it works brilliantly. As a piece of furniture, it's terrible (the seat is too long and the front edge of the seat will dig into your thighs).