FSC Certified®. Security artline. Side Seam. #9. 3-7/8" x 8-7/8". 24 lb. Top Window Size: 1-1/4" x 3-1/2". Top Window Placement: 2-3/16" from bottom. Bottom Window Size: 1" x 4". Bottom Window Placement: 3/4" from bottom. 500 per box.