Gauze sponge
Gauze sponges are disposable medical supplies used every day in hospitals and medical offices around the world. They are ordinarily made of gauze and are used to absorb blood and other fluids as well as clean wounds.
Common sizes include 2 by 2 inches (5.1 cm × 5.1 cm), 3 by 3 inches (7.6 cm × 7.6 cm), and 4 by 4 inches (10 cm × 10 cm).