28" x 22" x 6" Kraft Jumbo Corrugated Bookfolds. These one-piece bookfolds have scores at multiple depths to ensure the proper fit for your products with 1-6" depths. Great for shipping framed posters or artwork. Simply place product in the center, fold in the sides at your desired depth and seal with tape. Economical 200#-C/ECT-32 kraft corrugated construction. Shipped flat and sold in bundle quantities. 20/Bundle.