The short answer is yes. There are standard window sizes established for replacement windows. However, these standard window sizes vary for all types of windows. Each style has a minimum and maximum standard window width and a minimum and maximum standard window height. Between those, each window type has a range of sizes in standard increments. For example, standard double-hung window sizes vary in width from a minimum of 24 inches to a maximum of 48 inches wide, while they have a minimum height of 36 inches and a maximum of 72 inches with incremental heights of 44, 52, 54, and 62 inches.