A Beautiful Petite Sofa from Knoll Furniture. Charles Pfister designed his namesake modular Lounge Seating Collection in 1971. The clean-lined design offers both long-term flexibility and an enduring, highly versatile aesthetic. Upholstered in a Knoll Textiles Haze/ k109/3/ Color Barley The Petite Sofa features three-over-three cushions with a smaller-scale 6-foot width and sharp, angular lines. Constructed in sections with a combination plywood/hardwood seat and back with sagless webbing in the back. Cushion fill is a polyester fiber wrap over a foam core for a tight, tailored aesthetic.