This eye catching square brass porthole mirror opens just like an actual porthole. It measures 11.5" x 11.25". The mirror itself measures 7.5" x 7.5". The mirror can be removed and the brass porthole can be used as a picture frame if so desired. It will add a definite nautical touch to whatever room it is placed in and is a must have for those who appreciate high quality nautical decor. It makes a great gift, impressive decoration & will be admired by all those who love the sea.