Scaled down for sitting solo or à deux, Arc’s intimate confines are bordered by a thick piping between the sleek exterior and plush inside cushioning. Wanting to create a companionable feeling that suits even contract spaces, young designer Hallgeir Homstvedt emphasizes welcoming curves with the shell, seat cushion and backrest of the sofa upholstered in fine fabric or leather. A solid walnut or ash platform base adds an organic richness, resting cleanly on black steel feet.