18X37 Exterior White Pine Louver Shutter Blinds Made of white pine or ponderosa pine 1-1/16" thick, 18" wide and 37" length Side Stiles, top rail and center rail are 1-3/4" wide; Bottom rail is 3-5/8" wide Each louver measures 1/4" x 1-1/4" in dimension Sold by the pair