Pillow shams are decorative covers designed to enhance the appearance of pillows on a bed. Unlike standard pillowcases, which are primarily functional, shams often feature stylish designs, patterns, or textures that complement the overall bedding ensemble. They are typically used for decorative purposes and are placed behind or in front of regular pillows. Shams come in various sizes to fit different pillow dimensions, such as standard, queen, or king. They can be made from a variety of materials, including cotton, silk, or polyester, and are often used in conjunction with duvet covers and bedspreads to create a cohesive look in a bedroom.