Square Dressing Table Mirror A square dressing table mirror is one of the most popular styles. This style is designed to be placed against a wall without the need for nails. The mirror is also available in many different border materials. These materials are used to add style and sophistication to the room. Choose one that matches the style and decor of your room. A square mirror on a dressing table will add an elegant touch to any room. A square mirror is perfect for those who like to apply makeup on a daily basis. It should also be 75% of the size of the furniture.