About This Window Treatment Our Modern Cornice Board is the perfect choice for contemporary rooms. Its architectural styling adds the finishing touch to your windows while concealing the headrails and hardware of blinds and shades. Available in dozens of fabric choices, including solid color fabrics and our most popular patterns: Subtle Stripe, Classic Stripe and Country Club. Our fabric cornice boards are hand-made on an all-wood frame and include upholstery fabric fill, self cording for a finished look, and a matching dust cap cover. Modern Valances are 16" in drop length.Note: Measure exact width of window and round to the nearest ½”. Allow an additional 2” to compensate for cornice sides.