The term 'costume component' can refer to a variety of items used to complete a costume. Two of the most common components are masks and wigs, which are both four and three letters respectively. Masks are often used to cover the face and can be made from a variety of materials such as cloth, plastic, or latex. Wigs are often used to change the wearer's hairstyle and can be made from synthetic or human hair. Both masks and wigs are popular costume components that can help to create a unique look.