Thick, high-quality microfiber cloth by Bam. Perfect for wiping down cello, bow, strings after use. 30 cm x 40 cm (11.75″ x 15.75″). Just wash with soap and water, air dry. If you can’t picture how big that is, it’s a little larger than most of your sheet music. The cloth is treated with silver nano technology and has antibacterial and antifungal properties.