Bay frame only (no windows included) fits 9-5/16" wide by 5-1/2" high opening. Overall dimensions of the unit are 9-1/2" wide by 5-1/2" high. Side window openings are 1-11/16" wide by 5-1/16" high while the center opening is 4-15/16" wide by 5-1/16" high. Unfinished wood. One-inch scale dollhouse miniature building component. Made in the USA by Timberbrook Wood Products.