Bookfold mailers feature one-piece construction with scores at multiple depths to ensure a proper fit for your product. For quick packaging, simply place your product in the center of the 200#-B/ECT-32 corrugated cardboard, fold sides in, and seal with tape or peel and seal closure. Most bookfold mailers accommodate depths of up to 2 inches, while the jumbo multi-depth bookfold fits items up to 6 inches in depth. The smallest bookfold mailer is 11 1/8" x 8 5/8" and the largest is 38"x26". These ship flat and are sold in bundle quantities.