Blinds or window blinds is a covering used for windows. Window blinds are classified based on the material or the type of material used. Typically, window blinds are made of wood or plastic, sometimes metal or fabric. Any type of window coverings are considered blinds such as roller blinds ,vertical blinds and horizontal blinds. In smaller windows, roller types are usually used. This can be the small window in your kitchen or bedroom. IN medium scale window such as the window in your living room, horizontal types are usually used. In cases where the window to be covered is huge or big, vertical type is used.