There are 6 options for Basswood Plantation Shutter blades. Elliptical blades in 47mm, 63mm, 89mm and 114mm or Flat blades in 63mm and 89mm. Elliptical blades are an oval shape whereas Flat blades are a rectangular shape with rounded edges. Elliptical blades are the most common choice, with the size of the blade being determined by the size of the window. Smaller blades are used in smaller spaces and larger blades are used in larger spaces for a more modern look.