Non-sterile cotton balls by Medline are pure white cotton balls made from 100% bleached cotton. These balls have a 1.25 or 1 inch diameter and will not come apart when they are saturated with liquid. The medium sized cotton balls are available in bags of 2000 or a cases of 4000. The large size balls come by bags of 1000 or cases of 2000. They are perfect for use in wound care and are an essential component to any medicine cabinet or first aid kit.