Our Extra-Large Microfibre Polishing Cloths are 16" x 16" (40 x 40 cm). Typical polishing cloths are just 12" x 12" (30 x 30 cm). Our untreated microfibre cloths easily remove moisture, dust, oil, grease and fingerprints from your instruments such as brass, woodwind, piano, guitar, and percussion. They also work great on TVs, touchscreens, eReaders, car windows, mirrors, etc. They are soft, lint-free and washable.