The Ultra Pure Large Silver Polishing Cloth measures 30 x 40 cm (12 x 16 inches) and is large enough to polish all silver-plated instruments, from Piccolo to Sousaphone! Simply wipe the instrument with the silver polishing cloth and polish with our extra-large microfiber polishing cloth. This microfiber cloth has been pre-treated with a fine silver polishing compound. Do not wash the cloth, or the silver polish will rub off.