A "sleeve" is a part of a garment that covers the arm. It can vary in length, from short sleeves that extend just above the elbow to long sleeves that reach the wrist. Sleeves can also come in different styles, such as fitted, flared, or puffed, and are often designed to enhance the overall look of clothing. In addition to clothing, the term "sleeve" can refer to protective coverings for various items. For example, a CD sleeve protects discs from scratches, while a sleeve for a smartphone provides cushioning and protection from damage.