12" x 10 1/2" x 2" Kraft Corrugated Bookfolds. Economical Kraft Bookfolds help cut mailing costs. These one-piece bookfolds have scores at multiple depths to ensure the proper fit for your products. Simply place product in the center, fold in the sides at your desired depth and seal with tape. Economical 200#/ECT-32-B Kraft corrugated construction.