All About Window Seats
Use these measurements to ensure a comfy seat.
16 to 20 inches to sit facing forward with feet on the floor
10 to 20 inches high to lean, either below the window or against a side wall
Minimum of 30 inches to face forward, 50 inches to sit sideways with legs extended
About 18 inches, including cushion (2 to 4 inches). This chair height makes it ideal for dining when a table is pulled up.